BROOKDALE LIVING COMMUNITIES INC
SC 13D/A, 1997-12-16
SOCIAL SERVICES
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<PAGE>
 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              ____________________

                                  SCHEDULE 13D
                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)
                              ____________________

                       BROOKDALE LIVING COMMUNITIES, INC.
                                (Name of Issuer)

                    Common Stock, par value $0.01 per share
                         (Title of Class of Securities)

                                 112462  10  6
                                 (CUSIP Number)

                               Michael W. Reschke
                              77 West Wacker Drive
                                   Suite 3900
                               Chicago, IL 60601
                                 (312) 917-1500
          (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)

                                With a copy to:
                             Wayne D. Boberg, Esq.
                                Winston & Strawn
                              35 West Wacker Drive
                               Chicago, IL 60601
                                 (312) 558-5600

                               December 5, 1997
            (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box:  [_]
<PAGE>
     
                                 SCHEDULE 13D
- -----------------------                                   
 CUSIP NO. 112462 10 6                                   
- -----------------------                                  
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                          
              Michael W. Reschke                           
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2                                                              (a) [_]
                                                                (b) [_]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
             
- ------------------------------------------------------------------------------
      SOURCE OF FUNDS
 4    
             Not Applicable 
- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
 5    TO ITEMS 2(d) or 2(e)                                         [_]
      
- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      United States of America
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7     
     NUMBER OF            
                               0
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8    
                          
     OWNED BY                  4,203,043  
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9     
    REPORTING             
                               0
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10   
                               4,203,043  
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11    
      May be deemed to share beneficial ownership of the 1,382,410 shares of
      Common Stock, par value $0.01 per share ("Common Stock"), directly owned
      by The Prime Group, Inc., the 320,633 shares of Common Stock directly
      owned by Prime Group Limited Partnership and the 2,500,000 shares of
      Common Stock directly owned by Prime Group VI, L.P.
      
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12                  
                                                                       [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13    
      May be deemed to share beneficial ownership of (i) the approximate 19.27%
      equity interest in the Issuer directly owned by The Prime Group, Inc.,
      (ii) the approximate 4.47% equity interest in the Issuer directly owned by
      Prime Group Limited Partnership and (iii) the approximate 34.84% equity
      interest in the Issuer directly owned by Prime Group VI, L.P.
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
      IN
- ------------------------------------------------------------------------------

                                       2
<PAGE>
     
                                 SCHEDULE 13D
- -----------------------      
 CUSIP NO. 112462 10 6       
- -----------------------      
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                          
          The Prime Group, Inc.                                   
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2                                                              (a) [_]
                                                                (b) [_]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 
- ------------------------------------------------------------------------------
      SOURCE OF FUNDS
 4    
          00
- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
      TO ITEMS 2(d) or 2(e)                                            [_]
 5    
- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
          Illinois, United States of America
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7     
     NUMBER OF            
                          1,382,410   
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8    
                          
     OWNED BY             0       
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9     
    REPORTING             
                          1,382,410   
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10   
                          0        
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11    
      
      1,382,410 shares of Common Stock, par value $0.01 per share
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12                  
                                                                       [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13    
           Approximate 19.27% equity interest in the Issuer       
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
           CO
- ------------------------------------------------------------------------------

                                       3
<PAGE>
     
                                 SCHEDULE 13D
- -----------------------                               
CUSIP NO. 112462 10 6                                 
- -----------------------                               
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                          
      Prime Group VI, L.P.     
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2                                                              (a) [_]
                                                                (b) [_]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 
- ------------------------------------------------------------------------------
      SOURCE OF FUNDS
 4    
      00
- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
 5    TO ITEMS 2(d) or 2(e)                                            [_]

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Illinois, United States of America
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7     
     NUMBER OF            2,500,000
                             
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8    
                          0
     OWNED BY                    
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9     
    REPORTING             2,500,000
                         
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10   
                          0      
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11    
        2,500,000 shares of Common Stock, par value $0.01 per share
      
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12                  
                                                                     [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13    
      Approximate 34.84% equity interest in the Issuer
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
      PN
- ------------------------------------------------------------------------------

                                       4
<PAGE>
 
                                 SCHEDULE 13D
- -----------------------        
 CUSIP NO. 112462 10 6         
- -----------------------        
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                          
      PGLP, Inc.                                   
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
 2                                                              (a) [_]
                                                                (b) [_]
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 
- ------------------------------------------------------------------------------
      SOURCE OF FUNDS
 4    
      Not Applicable
- ------------------------------------------------------------------------------
      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
 5    TO ITEMS 2(d) or 2(e)                                           [_]

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 6    
      Illinois, United States of America
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     7     
     NUMBER OF            
                             0
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      8    
                          
     OWNED BY                2,500,000     
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     9     
    REPORTING                0
                         
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          10   
                             2,500,000         
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
11    
      May be deemed to share beneficial ownership of the 2,500,000 shares of
      Common Stock, par value $0.01 per share, directly owned by Prime 
      Group VI, L.P.
- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
12                  
                                                                       [_]
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
13    
      May be deemed to share beneficial ownership of the approximate 34.84% 
      equity interest in the Issuer directly owned by Prime Group VI, L.P.
- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON
14
      CO
- ------------------------------------------------------------------------------

                                       5
<PAGE>
 
Item 1.  Security and Issuer.

               This Amendment No. 1 to Schedule 13D relates to shares of Common
Stock, par value $0.01 per share ("Common Stock"), of Brookdale Living
Communities, Inc., a Delaware corporation (the "Company"). The principal
executive offices of the Company are located at 77 West Wacker Drive, Chicago,
Illinois 60601.

 
Item 2.  Identity and Background.

               (a) and (f) This Amendment No. 1 to Schedule 13D is filed by
each of Michael W. Reschke, an individual and a citizen of the United States of
America ("Reschke"), The Prime Group, Inc., an Illinois corporation ("PGI"),
Prime Group VI, L.P., an Illinois limited partnership ("PG-VI"), and PGLP, Inc.,
an Illinois corporation ("PGLPI").

               Reschke owns an approximate 42.2% equity interest in PGI and an
approximate 42.2% equity interest in PGLPI, which is the managing general
partner of, with a 1.0% interest in, PG-VI.

               (b)(i)   The business address of each of Reschke, PGI, PG-VI and
PGLPI is:
  
                        77 West Wacker Drive
                        Suite 3900
                        Chicago, Illinois  60601

               (ii)     Unless otherwise indicated in paragraph (c)(iii) of this
Item 2, the business address of each person listed in paragraph (c)(iii) of this
Item 2 is:

                        77 West Wacker Drive
                        Suite 3900
                        Chicago, Illinois  60601

               (c)(i)   Reschke is the Chairman, President and Chief Executive
Officer of PGI, the President and a member of the Board of Directors of PGLPI,
the Chairman of the Board of Trustees of Prime Group Realty Trust, a publicly
traded Maryland real estate investment trust ("PGRT"). The principal business
of PGRT is the acquisition, development, finance, construction, leasing,
marketing, renovation and property management of office and industrial
properties. The business address of PGRT is 77 West Wacker Drive, Suite 3900,
Chicago, Illinois 60601. Reschke is also the Chairman of the Board of Directors
of each of Prime Retail, Inc., a publicly traded real estate investment trust
involved in factory outlet centers, and the Company and a member of the Board of
Directors of Ambassador Apartments, Inc., a publicly traded real estate
investment trust involved in multi-family residential projects.

               (ii)   The principal business of each of PGI, PG-VI and PGLPI is
the ownership, development and management of, and investment in, directly or
indirectly, real estate.

               (iii)  The following table sets forth the name and the
principal occupation or employment of each director and executive officer
(except Reschke (see paragraph (c)(i) of this Item 2)) of PGI and PGLPI.

<TABLE>
<CAPTION> 
Name                                 Present Principal Occupation or Employment
- ----                                 ------------------------------------------
<S>                                  <C>
Robert J. Rudnik (A)(B).........     Executive Vice President/General Counsel and Secretary of PGI;
                                     Vice President and Secretary of PGLPI; Executive Vice President,
                                     General Counsel and Secretary of PGRT; General Counsel and 
                                     Secretary of the Company      

Gary J. Skoien..................     Executive Vice President of PGI; Vice President of PGLPI
</TABLE>
                                       6

<PAGE>
 
<TABLE>
<CAPTION>

Name                                   Present Principal Occupation or Employment
- ----                                   ------------------------------------------
<S>                                     <C>
Ray R. Grinvalds (A).............      Senior Vice President/Asset and Development Management of PGI; Vice
                                       President and Treasurer of PGLPI

James T. Horn (A)................      Senior Vice President/Assistant General Counsel of PGI; Vice President and
                                       Assistant Secretary of PGLPI

Mark K. Cynkar...................      Vice President/Chief Financial Officer of PGI

Bohdan P. Hirniak................      Vice President/Land Development Division of PGI

Warren H. John (A)(B)............      Vice President of PGI; Vice President and Assistant Secretary of PGLPI

Robert E. Lemke..................      Vice President/Single Family Housing of PGI

Glenn D. Reschke (A).............      Executive Vice President/Development of Prime Retail, Inc.
c/o The Prime Group, Inc.
100 East Pratt Street
Baltimore, MD 21202

Edward J. John (A)...............      Orthodontist
1420 N. Arlington Heights Rd.
Arlington Heights, IL 60004

- ---------------
(A) Director of PGI
(B) Director of PGLPI
</TABLE> 

               All of the executive officers and directors of PGI and PGLPI are
citizens of the United States of America.

               (d) and (e) During the last five years, none of Reschke, PGI, 
PG-VI or PGLPI or any of the directors or executive officers of PGI or PGLPI (i)
has been convicted in a criminal proceeding (excluding traffic violations or 
similar misdemeanors) or (ii) was a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future 
violations of, or prohibiting or mandating activities subject to, federal or 
state securities laws or finding any violation with respect to such laws.

Item 3.  Source and Amount of Funds or Other Consideration.

               Pursuant to a Formation Agreement, dated as of May 7, 1997, by
and among the Company, PGI, PGLP, Brookdale Holdings, Inc. and Mark J. Schulte
(the "Formation Agreement"), and in connection with the consummation of the
Company's initial public offering of Common Stock on May 7, 1997, PGI and
certain of its affiliates contributed the assets and operations of PGI's senior
and assisted living division to the Company in exchange for the receipt by PGI
and Prime Group Limited Partnership, an Illinois limited partnership ("PGLP"),
of 1,382,410 and 320,633 shares of Common Stock, respectively, and the
assumption by the Company of certain indebtedness of PGI's senior and assisted
living division in the aggregate amount of $65.0 million.


                                       7

<PAGE>
        
          Pursuant to a Credit Agreement, dated as of May 7, 1997, by and among
PG-VI and Healthcare Realty Trust Incorporated ("HRTI") (the "Credit
Agreement"), and in connection with the consummation of the Company's initial
public offering of Common Stock on May 7, 1997, PG-VI obtained a loan in the
aggregate amount of $18.0 million (the "HRTI Loan") which was used to finance a
portion of PG-VI's May 7, 1997 purchase of 2,500,000 shares of Common Stock at a
purchase price of $10.695 per share. The balance of the purchase price for such
shares, approximately $8.74 million, was contributed or advanced to PG-VI by its
partners. PG-VI repaid the HRTI Loan in full on November 17, 1997.

          Each of the Formation Agreement and the Credit Agreement are
identified as Exhibits I and II hereto, respectively, and incorporated herein by
reference.

Item 4. Purpose of Transaction.

          PGI and PGLP acquired the shares of Common Stock owned by such
entities in order to maintain a significant investment in the Company following
the consummation of the Company's initial public offering.  PG-VI purchased the
shares of Common Stock owned by it for investment purposes and to facilitate the
formation of the Company.

          On May 7, 1997, the Company granted to Reschke, as Chairman of the
Board of the Company, options to acquire 100,000 shares of Common Stock.  The
options vest, subject to the satisfaction of certain conditions, at the rate of
25% per year over the next four years commencing on the first anniversary of
their date of grant and will have a term of 10 years.  The exercise price of the
options is the initial public offering price of $11.50 per share.

          Except as set forth in this Amendment No. 1 to Schedule 13D, none of
Reschke, PGI, PG-VI or PGLPI has any current plans or proposals which relate to
or would result in the types of transactions set forth in paragraphs (a) through
(j) of the instructions for this Item 4.

Item 5. Interest in Securities of the Issuer.

          (a) PGI directly beneficially owns 1,382,410 of the 4,203,043 shares
of Common Stock to which this Amendment No. 1 to Schedule 13D relates, which
number of shares constitutes approximately 19.27% of the total outstanding
shares of the Company's Common Stock. PGLP beneficially owns 320,633 of the
4,203,043 shares of Common Stock to which this Amendment No. 1 to Schedule 13D
relates, which number of shares constitutes approximately 4.47% of the total
outstanding shares of the Company's Common Stock. PG-VI beneficially owns
2,500,000 of the 4,203,043 shares of Common Stock to which this Amendment No. 1
to Schedule 13D relates, which number of shares constitutes approximately 34.84%
of the total outstanding shares of the Company's Common Stock. By virtue of his
ability to control each of PGI, PGLP and PG-VI, Reschke may be deemed to share
beneficial ownership of the 1,382,410, 320,633 and 2,500,000 shares of Common
Stock directly owned by PGI, PGLP and PG-VI, respectively. By virtue of its
ability to control PG-VI, PGLPI may be deemed to share beneficial ownership of
the 2,500,000 shares of Common Stock directly owned by PG-VI.

          (b) Each of PGI, PGLP and PG-VI has the sole power to direct the vote
of the 1,382,410, 320,633 and 2,500,000 shares of Common Stock directly owned by
PGI, PGLP and PG-VI, respectively.  Reschke may be deemed to share the power to
direct the vote of the 1,382,410, 320,633 and 2,500,000 shares of Common Stock
directly owned by PGI, PGLP and PG-VI, respectively, because Reschke has the
ability to control each of PGI, PGLP and PG-VI.  PGLPI may be deemed to share
the power to direct the vote of the 2,500,000 shares of Common Stock directly
owned by PG-VI because PGLPI is the managing general partner of PG-VI.

          (c) None of Reschke, PGI, PGLP or PG-VI, nor, to the best of their
knowledge, any of the executive officers or directors of PGI or PGLPI, has
effected any transaction in securities of the Company during the past 60 days.

          (d) Other than Och-Ziff Capital Management, L.P., a Delaware limited
partnership ("Och-Ziff"), pursuant to the terms and conditions of a Pledge and
Security Agreement, dated as of December 5, 1997, by and between PG-VI and 
Och-Ziff (the "Pledge and Security Agreement"), no person is known to have the
right to receive or the power to direct the receipt of dividends from, or the
proceeds from the sale of, securities held by Reschke, PGI, PGLP or PG-VI,
except for Reschke, PGI, PGLP, PG-VI or PGLPI.

          (e)  Not applicable.

                                       8

<PAGE>
 

Item 6.  Contracts, Arrangements, Understandings or Relationships with Respect
         to Securities of the Issuer.

          Pursuant to the terms and conditions of a Registration Rights
Agreement, dated as of May 7, 1997, by and among the Company, PGI, PGLP and PG-
VI, as amended by Amendment No. 1 to Registration Rights Agreement, dated as of
December 5, 1997, by and among the Company, PGI, PGLP and PG-VI ("Amendment No.
1 to Registration Rights Agreement") (colletively, the "Registration Rights
Agreement"), the Company granted demand and incidental registration rights to
PGI, PGLP and PG-VI for the registration of shares of Common Stock owned by PGI,
PGLP and PG-VI under the Securities Act of 1933, as amended. Under the
Registration Rights Agreement, three demand registrations are permitted during
the first five years following the Company's initial public offering of Common
Stock and one demand registration per year is permitted each year thereafter
until PGI, PGLP and PG-VI collectively own less than 10% of the outstanding
Common Stock. The Company will pay the fees and expenses of the demand
registrations and the incidental registrations, while PGI, PGLP and PG-VI will
pay all underwriting discounts and commissions. These registration rights are
subject to certain conditions and limitations, including the right of
underwriters to limit the number of shares owned by PGI, PGLP and PG-VI included
in such registration.

          Pursuant to the terms and conditions of the Credit Agreement, each of
PG-VI, PGI, PGLP and Mark J. Schulte pledged, pursuant to separate Pledge and
Security Agreements, each dated as of May 7, 1997 (a form of which is identified
as Exhibit IV hereto and incorporated herein by reference), the 2,500,000 shares
of Common Stock purchased by PG-VI, together with 1,369,910, 320,633 and 296,957
shares of Common Stock acquired by PGI, PGLP and Mr. Schulte, respectively,
pursuant to the Formation Agreement, in order to secure the obligations of PG-VI
under the Credit Agreement. In addition, each of PGI, PGLP, PGLPI, Mr. Schulte,
Prime International, Inc., an Illinois corporation ("PII"), and Prime Group II,
L.P., an Illinois limited partnership ("PG-II"), guaranteed the payment in full
of the obligations of PG-VI under the Credit Agreement pursuant to separate
Guaranties, each dated as of May 7, 1997 (a form of which is identified as
Exhibit V hereto and incorporated herein by reference), made in favor of HRTI.
PG-VI repaid the HRTI Loan in full on November 17, 1997. Consequently, the
Pledge and Security Agreements were terminated and the Guaranties were
terminated and released as of November 17, 1997.

          Pursuant to the terms and conditions of a Stock Option and Deposit
Agreement, dated as of May 7, 1997, by and between PGI and Darryl W. Copeland,
Jr. (the "Copeland Stock Option Agreement"), Mr. Copeland received an option,
subject to a one year vesting period, to purchase 100,000 shares of Common Stock
from PGI at a purchase price of $0.01 per share.  In the event the employment of
Mr. Copeland is terminated by the Company for any reason or in the event Mr.
Copeland voluntarily terminates his employment with the Company due to a "change
of control" of the Company and a material diminution of his duties and
responsibilities or compensation prior to the expiration of the vesting period,
the option immediately vests.

          Pursuant to the terms and conditions of a Stock Purchase Agreement and
Agreement Concerning Option Shares, dated as of May 7, 1997, by and among PGI,
PG-VI and Darryl W. Copeland, Jr. (the "Stock Purchase Agreement"), PG-VI agreed
to sell to Mr. Copeland 25,000 shares of Common Stock (the "Purchased Shares")
for an aggregate purchase price of $272,722.50.  The purchase and sale of the
Purchased Shares shall occur no later than May 8, 2000.  In the event the
purchase and sale of the Purchased Shares does not occur on or before May 8,
2000, Mr. Copeland's right to purchase the Purchased Shares and PG-VI's
obligation to sell the Purchased Shares automatically terminate.  Mr. Copeland
has no voting rights as a stockholder with respect to the Purchased Shares until
the closing of the purchase and sale of the Purchased Shares.

          Pursuant to the terms and conditions of a Stock Option Agreement,
dated as of May 7, 1997, by and between PGI and Blackacre Bridge Capital L.L.C.,
a Delaware limited liability company ("Blackacre") (the "Blackacre Stock Option
Agreement"), PGI granted to Blackacre an option to purchase 12,500 shares of
Common Stock at a price per share equal to the lesser of $12.00 or the average
of all closing prices of the Common Stock from the date of the consummation of
the Company's initial public offering to that date which is six months after the
date of the consummation of the Company's initial public offering.  The term of
the option shall continue in effect until May 7, 2000. Blackacre has no rights
as a stockholder with respect to such shares until the date of the sale of such
shares upon the exercise of such option.

                                       9
<PAGE>

          Pursuant to the terms and conditions of a Note Purchase Agreement,
dated as of December 5, 1997, by and between PG-VI and Och-Ziff (the "Note
Purchase Agreement"), PG-VI issued an exchangeable note, dated December 5, 1997,
having a principal amount of $20.0 million and a five year term (the
"Exchangeable Note") to Och-Ziff. Pursuant to the terms and conditions of the
Exchangeable Note, Och-Ziff shall have the right, commencing on November 15,
1998 (the "Initial Exchange Date"), to exchange a portion of the outstanding
principal amount of the Exchangeable Note, plus accrued interest thereon, for
shares of Common Stock of the Company held by PG-VI ("Exchange Shares") at the
exchange rate specified therein (an "Exchange"). On and after the Initial
Exchange Date, Och-Ziff shall be entitled to exchange up to $5.0 million of the
outstanding principal amount of the Exchangeable Note, plus accrued interest
thereon, on each of January 15, 1999, March 15, 1999 and May 15, 1999. Subject
to certain exceptions, the number of Exchange Shares exchangeable by Och-Ziff
pursuant to an Exchange shall be equal to (x) the principal amount, plus accrued
interest thereon, of the Exchangeable Note specified for exchange in the notice
of exchange divided by (y) the Exchange Price in effect on the date of exchange.
The "Exchange Price" shall be the product of (A) 88% multiplied by (B) the
average of the closing bid prices for the Common Stock on the Nasdaq National
Market on the seven trading days immediately preceding the date of exchange. 
PG-VI shall have the right, pursuant to the terms and conditions of the
Exchangeable Note, to effect an optional redemption of (i) the principal amount,
plus accrued interest thereon, of the Exchangeable Note sought to be exchanged
by Och-Ziff, at the applicable optional redemption price specified therein, if
on the date of delivery of a notice of exchange the Exchange Price for the
Common Stock is less than $17.60 per share, and (ii) the outstanding principal
amount, plus accrued interest thereon, of the Exchangeable Note, at the
applicable optional redemption price specified therein, if a period during which
Och-Ziff may not sell or otherwise transfer, pursuant to an effective "shelf"
registration statement under Rule 415 of the Securities Act of 1933, as amended,
covering the resale on a continuous basis of the Exchange Shares which Och-Ziff
becomes entitled to receive, any Exchange Shares continues for more than 90
days. Och-Ziff shall have the right, pursuant to the terms and conditions of the
Exchangeable Note, to effect a mandatory redemption by PG-VI of all or any
portion of the outstanding principal amount, plus accrued interest thereon, of
the Exchangeable Note, at the mandatory redemption price specified therein, if a
mandatory redemption event specified therein occurs.

          Pursuant to the terms and conditions of the Note Purchase Agreement,
PG-VI pledged 1,370,000 shares of its 2,500,000 shares of Common Stock of the
Company to Och-Ziff, pursuant to the terms and conditions of the Pledge and
Security Agreement, in order to secure the obligations of PG-VI under the
Exchangeable Note issued to Och-Ziff. In addition, each of PGI, PGLP, PGLPI, PII
and PG-II guaranteed the payment in full of the obligations of PG-VI under the
Exchangeable Note issued to Och-Ziff pursuant to separate Guaranties, each dated
as of December 5, 1997 (a form of which is attached hereto as Exhibit XIV and
incorporated herein by reference), made in favor of Och-Ziff.

          Each of the Registration Rights Agreement, the Copeland Stock Option
Agreement, the Stock Purchase Agreement and the Blackacre Stock Option Agreement
are identified as Exhibits III, VI, VII and VIII hereto, respectively, and
incorporated herein by reference. Each of Amendment No. 1 to Registration Rights
Agreement, the Note Purchase Agreement, the Exchangeable Note and the Pledge and
Security Agreement are attached hereto as Exhibits X, XI, XII and XIII,
respectively, and incorporated herein by reference.

                                      10

<PAGE>

Item 7.  Material to be Filed as Exhibits.

            Exhibit I     Formation Agreement, dated as of May 7, 1997, by and
                          among the Company, PGI, PGLP, Brookdale Holdings, Inc.
                          and Mark J. Schulte, as filed with the Securities and
                          Exchange Commission on August 14, 1997 as Exhibit 10.1
                          to the Company's Form 10-Q (Commission File No. 0-
                          22253) and incorporated herein by reference

            Exhibit II    Credit Agreement, dated as of May 7, 1997, by and
                          between HRTI and PG-VI*

            Exhibit III   Registration Rights Agreement, dated as of May 7,
                          1997, by and among the Company, PGI, PGLP and PG-VI,
                          as filed with the Securities and Exchange Commission
                          on August 14, 1997 as Exhibit 10.3 to the Company's
                          Form 10-Q (Commission File No. 0-22253) and
                          incorporated herein by reference

            Exhibit IV    Form of Pledge and Security Agreement*

            Exhibit V     Form of Guaranty*

            Exhibit VI    Stock Option and Deposit Agreement, dated as of May 7,
                          1997, by and between Darryl W. Copeland, Jr. and PGI,
                          as filed with the Securities and Exchange Commission
                          on August 14, 1997 as Exhibit 10.42 to the Company's
                          Form 10-Q (Commission File No. 0-22253) and
                          incorporated herein by reference

            Exhibit VII   Stock Purchase Agreement and Agreement Concerning
                          Option Shares, dated as of May 7, 1997, by and among
                          Darryl W. Copeland, Jr., PGI and PG-VI, as filed with
                          the Securities and Exchange Commission on August 14,
                          1997 as Exhibit 10.43 to the Company's Form 10-Q
                          (Commission File No. 0-22253) and incorporated herein
                          by reference

            Exhibit VIII  Stock Option Agreement, dated as of May 7, 1997, by
                          and between PGI and Blackacre*

            Exhibit IX    Joint Acquisition Statement pursuant to Rule 13-
                          d(f)(1) of the Securities Exchange Act of 1934, as
                          amended, by Reschke, PGI, PG-VI and PGLPI*

            Exhibit X     Amendment No. 1 to Registration Rights Agreement,
                          dated as of December 5, 1997, by and among the
                          Company, PGI, PGLP and PG-VI

            Exhibit XI    Note Purchase Agreement, dated as of December 5, 1997,
                          by and between PG-VI and Och-Ziff

            Exhibit XII   Exchangeable Note, dated December 5, 1997, issued by
                          PG-VI to Och-Ziff

            Exhibit XIII  Pledge and Security Agreement, dated as of December 5,
                          1997, by and between PG-VI and Och-Ziff

            Exhibit XIV   Form of Guaranty
            ------------------
            *Previously filed.

                                      11
<PAGE>



                                   SIGNATURE
                                   ---------


          After reasonable inquiry and to the best of his or its knowledge and
belief, the undersigned certifies that the information set forth in this
Amendment No. 1 to Schedule 13D is true, complete and correct.

 

                                  /s/ Michael W. Reschke
                                  ----------------------------------------------
                                  Michael W. Reschke
 
 
                                  Dated: December 16, 1997


 
<PAGE>
 
                                   SIGNATURE
                                   ---------

          After reasonable inquiry and to the best of his or its knowledge and
belief, the undersigned certifies that the information set forth in this
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              THE PRIME GROUP, INC.


                              By:    /s/  Michael W. Reschke
                                 -----------------------------------------------
                              Name:   Michael W. Reschke
                              Title:  President


                              Dated:  December 16, 1997



<PAGE>


                                   SIGNATURE
                                   ---------


          After reasonable inquiry and to the best of his or its knowledge and
belief, the undersigned certifies that the information set forth in this
Amendment No. 1 to Schedule 13D is true, complete and correct.

                                  PRIME GROUP VI, L.P.
                             
                                  By: PGLP, Inc.
                                      Managing General Partner
                                      
                                      By: /s/  Michael W. Reschke
                                          --------------------------------------
                                      Name:  Michael W. Reschke
                                      Title: President
                             
                             
                                  Dated: December 16, 1997

<PAGE>


 
                                   SIGNATURE
                                   ---------


          After reasonable inquiry and to the best of his or its knowledge and
belief, the undersigned certifies that the information set forth in this
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PGLP, INC.


                              By:    /s/  Michael W. Reschke
                                 -----------------------------------------------
                              Name:   Michael W. Reschke
                              Title:  President


                              Dated:  December 16, 1997


 
<PAGE>
 

                                 EXHIBIT INDEX

Exhibit No.        Description
- -----------        -----------

Exhibit I          Formation Agreement, dated as of May 7, 1997, by and among
                   the Company, PGI, PGLP, Brookdale Holdings, Inc. and Mark J.
                   Schulte, as filed with the Securities and Exchange Commission
                   on August 14, 1997 as Exhibit 10.1 to the Company's Form 10-Q
                   (Commission File No. 0-22253) and incorporated herein by
                   reference

Exhibit II         Credit Agreement, dated as of May 7, 1997, by and between
                   HRTI and PG-VI*

Exhibit III        Registration Rights Agreement, dated as of May 7, 1997, by
                   and among the Company, PGI, PGLP and PG-VI, as filed with the
                   Securities and Exchange Commission on August 14, 1997 as
                   Exhibit 10.3 to the Company's Form 10-Q (Commission File No.
                   0-22253) and incorporated herein by reference

Exhibit IV         Form of Pledge and Security Agreement*

Exhibit V          Form of Guaranty*

Exhibit VI         Stock Option and Deposit Agreement, dated as of May 7, 1997,
                   by and between Darryl W. Copeland, Jr. and PGI, as filed with
                   the Securities and Exchange Commission on August 14, 1997 as
                   Exhibit 10.42 to the Company's Form 10-Q (Commission File No.
                   0-22253) and incorporated herein by reference

Exhibit VII        Stock Purchase Agreement and Agreement Concerning Option
                   Shares, dated as of May 7, 1997, by and among Darryl W.
                   Copeland, Jr., PGI and PG-VI, as filed with the Securities
                   and Exchange Commission on August 14, 1997 as Exhibit 10.43
                   to the Company's Form 10-Q (Commission File No. 0-22253) and
                   incorporated herein by reference

Exhibit VIII       Stock Option Agreement, dated as of May 7, 1997, by
                   and between PGI and Blackacre*

Exhibit IX         Joint Acquisition Statement pursuant to Rule 13-d(f)(1) of
                   the Securities Exchange Act of 1934, as amended, by Reschke,
                   PGI, PG-VI and PGLPI*

Exhibit X          Amendment No. 1 to Registration Rights Agreement, dated as of
                   December 5, 1997, by and among the Company, PGI, PGLP and 
                   PG-VI

Exhibit XI         Note Purchase Agreement, dated as of December 5, 1997, by and
                   between PG-VI and Och-Ziff

Exhibit XII        Exchangeable Note, dated December 5, 1997, issued by PG-VI to
                   Och-Ziff

Exhibit XIII       Pledge and Security Agreement, dated as of December 5, 1997, 
                   by and between PG-VI and Och-Ziff

Exhibit XIV        Form of Guaranty
- ------------------
*Previously filed.


<PAGE>
 
                                                                       EXHIBIT X

                               AMENDMENT NO. 1 TO
                         REGISTRATION RIGHTS AGREEMENT
                         -----------------------------


     This AMENDMENT NO. 1 to REGISTRATION RIGHTS AGREEMENT (this "Amendment"),
dated as of December 5, 1997, is made and entered into by and among BROOKDALE
LIVING COMMUNITIES, INC., a Delaware corporation (the "Corporation"), THE PRIME
GROUP, INC., an Illinois corporation ("Prime"), PRIME GROUP LIMITED PARTNERSHIP,
an Illinois limited partnership ("PGLP"), and PRIME GROUP VI, L.P., an Illinois
limited partnership ("PG-VI, L.P.").  Prime, PGLP and PG-VI, L.P. are sometimes
referred to herein individually as a "Holder" and collectively as the "Holders."


                                    RECITALS
                                    --------

     WHEREAS, the Corporation and the Holders are party to that certain
Registration Rights Agreement, dated May 7, 1997, by and among the Corporation
and each of the Holders (the "Agreement") pursuant to which the Corporation
granted to the Holders certain rights to cause the Corporation to register the
Registrable Shares (as hereinafter defined) for sale under the Securities Act
(as hereinafter defined);

     WHEREAS, among other things, Sections 5(a) and 5(b) of the Agreement
provide that the Corporation shall use its best efforts to keep any Registration
Statement filed with respect to Registrable Shares pursuant to the Agreement
effective, and to prepare and file with the Commission (as hereinafter defined)
such amendments and supplements to any such Registration Statement and the
prospectus used in connection therewith, for such period as may be reasonably
necessary to effect the sale of such securities, such period not to exceed
twelve (12) months;

     WHEREAS, PG-VI, L.P. desires to request a Demand Registration pursuant to
the Agreement with respect to certain of its Registrable Shares that, in order
to effect the disposition of such Registrable Shares as contemplated, will
require that the Registration Statement relating thereto be kept effective, and
amended or supplemented, as necessary, for up to twenty-four (24) months; and

     WHEREAS, the Corporation believes that it may indirectly benefit from the
proposed registration and that the additional costs associated therewith would
not be prohibitive.

<PAGE>
 
                                  AGREEMENTS
                                  ----------

     NOW, THEREFORE, in consideration of the recitals and the mutual promises
and covenants herein contained and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
hereby agree as follows:

     1.   Definitions.  Capitalized terms used but not otherwise defined herein
shall have the meanings given to such terms in the Agreement.

     2.   Amendments. The Agreement is hereby amended as follows:

          (i)  Section 5(a) of the Agreement is hereby amended by inserting in
     the fifth line thereof immediately after the phrase "twelve (12) months"
     appears the parenthetical phrase "(or, in the case of not more than one
     Demand Registration requested by PG-VI, L.P. (or its permitted assigns), a
     period not to exceed twenty-four (24) months)"; and

          (ii) Section 5(b) of the Agreement is hereby amended by inserting in
     the sixth line thereof immediately after the phrase "twelve (12) months"
     appears the parenthetical phrase "(or, in the case of not more than one
     Demand Registration requested by PG-VI, L.P. (or its permitted assigns), a
     period not to exceed twenty-four (24) months)".

     3.   Full Force and Effect.  The Agreement remains in full force and effect
in each and every respect except as amended hereby.

     4.   Severability.  Whenever possible, each provision of this Amendment
will be interpreted in such manner as to be effective and valid under applicable
law, but if any provision of this Amendment is held to be prohibited by or
invalid under applicable law, such provision will be ineffective only to the
extent of such prohibition or invalidity, without invalidating the remainder of
this Amendment.

     5.   Descriptive Headings.  The descriptive headings of this Amendment are
inserted for convenience of reference only and do not constitute a part of and
shall not be utilized in interpreting this Amendment.

     6.   Counterparts.  This Amendment may be executed in any number of
counterparts, each of which when so executed and delivered shall be deemed an
original, and such counterparts together shall constitute one instrument.

                           [signature page follows]

                                      -2-
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to
Registration Rights Agreement to be executed and delivered in their names and on
their behalf as of the date first set forth above.

                                        THE CORPORATION:

                                        BROOKDALE LIVING COMMUNITIES, INC.,
                                        a Delaware corporation


                                        By: /s/ Darryl W. Copeland, Jr.
                                            -------------------------------
                                        Name: Darryl W. Copeland, Jr.
                                             ------------------------------
                                        Its: Executive Vice President
                                             ------------------------------

                                        THE HOLDERS:

                                        THE PRIME GROUP, INC.,
                                        an Illinois corporation


                                        By: /s/ Jeffrey A. Patterson
                                            -------------------------------
                                        Name: Jeffrey A. Patterson
                                             ------------------------------
                                        Its: Executive Vice President
                                             ------------------------------

                                        PRIME GROUP LIMITED PARTNERSHIP,
                                        an Illinois limited partnership


                                        By: /s/ Michael W. Reschke
                                            -------------------------------
                                            Michael W. Reschke,
                                            Managing General Partner


                                        PRIME GROUP VI, L.P.

                                        By:   PGLP, Inc.,
                                              its Managing General Partner


                                              By: /s/ Jeffrey A. Patterson
                                                  -------------------------
                                              Name: Jeffrey A. Patterson
                                                    -----------------------
                                              Its: Vice President
                                                   ------------------------

                                      S-1


<PAGE>
                                                                      EXHIBIT XI


                            NOTE PURCHASE AGREEMENT

          NOTE PURCHASE AGREEMENT (this "Agreement"), dated as of December 5,
1997, by and between PRIME GROUP VI, L.P., an Illinois limited partnership (the
"Company"), and OCH-ZIFF CAPITAL MANAGEMENT, L.P., a Delaware limited
partnership (the "Purchaser").

          WHEREAS: The Company wishes to sell and the Purchaser wishes to buy,
subject to the terms and conditions set forth in this Agreement, a note of the
Company in the form of Exhibit A hereto and having an initial principal amount
of $20,000,000 (the "Note"), which Note is exchangeable for shares of Common
Stock of BROOKDALE LIVING COMMUNITIES, INC., a Delaware corporation ("BLCI"),
on the terms and conditions set forth herein, in reliance on the exemption
from securities registration afforded by the provisions of Section 4(2) under
the Securities Act of 1933, as amended.

          NOW, THEREFORE, the parties hereto agree as follows:

1.        DEFINITIONS.

          As used herein, in addition to capitalized terms defined in the
recitals hereof and in the Note, the following capitalized terms shall have the
following meanings:

          (a) "Cash Equivalents" has the meaning ascribed thereto in the
Security Agreement.

          (b) "Closing" and "Closing Date" have the meaning ascribed thereto
in Section 2.2.
 
          (c) "Collateral" has the meaning ascribed thereto in the Security 
Agreement.   

          (d) "Commission" means the Securities and Exchange Commission.    

          (e) "Equity Security" has the meaning ascribed thereto in the Security
Agreement.

          (f) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

          (g) "Guaranty" means any or each guaranty to be issued on the date
hereof by The Prime Group, Inc., Prime Group II, LP, Prime International, Inc.,
PGLP, Inc., and 
<PAGE>
 
Prime Group Limited Partnership guaranteeing the obligations of the Company
under the Note and this Agreement.

          (h) "Indemnified Party", "Indemnifying Party", "Company Indemnified
Party" and "Purchaser Indemnified Party" have the meanings ascribed thereto in
Sections 8(a), 8(b) and 7(c).

          (i) "Investment Grade Securities" has the meaning ascribed thereto
in the Security Agreement.

          (j) "Minimum Required Amount" has the meaning ascribed thereto in the
Security Agreement.

          (k) "Pledged Shares" has the meaning ascribed thereto in the Security
Agreement. 

          (l) "Purchase Price" has the meaning ascribed thereto in Section 2.1.

          (m) "Registration Deadline" means November 15, 1998.

          (n) "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of May 7, 1997, among BLCI, The Prime Group, Inc., Prime
Group Limited Partnership and the Company, as amended by Amendment No. 1, dated
as of the date hereof (the "Registration Rights Agreement Amendment").

          (o) "Reorganization" has the meaning ascribed thereto in Section
3.5.

          (p) "Security Agreement" means the Pledge and Security Agreement,
dated the date hereof, between the Company and the Purchaser.

          (q) "Securities Act" means the Securities Act of 1933, as amended.

          (r) "Standstill Period" has the meaning ascribed thereto in Section
6.4. 

          (s) "Target Amount" has the meaning ascribed thereto in the Security
Agreement.

          (t) "Transaction Documents" means this Agreement, the Note, the
Security Agreement, the Guaranty given by each guarantor, the Registration
Rights Agreement Amendment and all other agreements, documents, certificates or
other instruments delivered by the Company at the Closing.

          (u) "Value" means, as of any date: (i) with respect to BLCI Stock,
Cash Equivalents or Equity Securities (x) the Closing Bid Price thereof on the
Trading Day
                 
                                       2
<PAGE>
 

immediately prior to such date, multiplied by (y) the quantity thereof then held
as collateral by the Purchaser in which the Purchaser has a valid and perfected
first priority security interest, subject to no other liens or security
interests, pursuant to the Security Agreement; (ii) with respect to Investment
Grade Securities, (x) the lower of (I) the Closing Bid Price thereof on the
Trading Day immediately prior to such date, and (II) the par value thereof,
multiplied by (y) the quantity thereof then held as collateral by the Purchaser
in which the Purchaser has a valid and perfected first priority security
interest, subject to no other liens or security interests, pursuant to the
Security Agreement; (iii) with respect to cash, the dollar amount thereof; and
(iv) with respect to the Collateral, the aggregate of the Values of each item
constituting the Collateral.

          The following non-capitalized terms shall have the respective
following meanings: (i) an "affiliate" of a party shall mean any person or
entity controlling, controlled by or under common control with that party; and
(ii) a "business day" means any day, other than a Saturday, Sunday or any other
day on which the New York Stock Exchange or commercial banks in the cities of
Chicago and New York are authorized to close for business.

2.        PURCHASE AND SALE OF NOTE.

          2.1  Agreement to Purchase and Sell. On the terms and subject to the
               ------------------------------
conditions set forth herein, the Company agrees to sell at the Closing (as
defined below), and the Purchaser agrees to purchase, a promissory note of the
Company in the form of the Note attached hereto as Exhibit A, in the principal
amount of TWENTY MILLION DOLLARS ($20,000,000), at a purchase price equal to
such principal amount (the "Purchase Price").

          2.2  Closing. The closing of the purchase and sale of the Note (the
               -------
"Closing") shall be held at the offices of Winston & Strawn, counsel to the
Company, in New York, New York, or at such other time and place as is mutually
agreed to by the parties. Subject to the satisfaction of the conditions set
forth herein, the Closing will be deemed to occur when this Agreement and the
other Transaction Documents have been executed and delivered by the Company,
the Purchaser and each other party thereto, and full payment of the amount of
the Purchase Price (net of the expenses referred to in Section 9.l) has been
made by the Purchaser by wire transfer of immediately available funds to an
account designated by the Company against delivery by the Company of a duly
executed Note to the Purchaser. The date on which the Closing is deemed to
occur is referred to herein as the "Closing Date".

                                       3
<PAGE>
 
3.        REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

          The Company makes the following representations and warranties to the
Purchaser as of the day hereof (which shall be true as of the Closing, and which
shall be deemed to be repeated as of the date of any additional pledge and
delivery of shares of BLCI Stock or other Collateral to the Purchaser as
provided in the Security Agreement):

          3.1  Organization: Power and Authority. It is a limited partnership
               ---------------------------------
duly organized, validly existing and in good standing under the laws of its
jurisdiction of organization, and is duly qualified as a foreign limited
partnership and is in good standing in each jurisdiction in which such
qualification is required by law, other than those jurisdictions as to which the
failure to be so qualified or in good standing would not, individually or in the
aggregate, reasonably be expected to have a material adverse effect on its
business or financial condition. It has the partnership power and authority to
own or hold under lease the properties it purports to own or hold under lease,
to transact the business it transacts and proposes to transact, to execute and
deliver this Agreement and the other Transaction Documents to which it is a
party and to perform its obligations hereunder and thereunder.

          3.2  Authorization, etc. This Agreement and the other Transaction
               ------------------
Documents to which it is a party and the Note have been duly authorized by all
necessary partnership action on the part of the Company. This Agreement and the
other Transaction Documents to which it is a party each constitutes, and upon
execution and delivery thereof the Note will constitute, a legal, valid and
binding obligation of the Company, enforceable against it in accordance with its
terms, except as such enforceability may be limited by (i) applicable
bankruptcy, insolvency, reorganization, moratorium or other similar laws
affecting the enforcement of creditors' rights generally and (ii) general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

          3.3  Disclosure. This Agreement and the other Transaction Documents,
               ----------
and the financial statements listed or described on Schedule 3.5 (copies of
which have been previously delivered to the Purchaser), taken as a whole, do
not contain any untrue statement of a material fact or omit to state
any material fact necessary to make the statements therein not misleading in
any material respect in light of the circumstances under which they were made.
        
          3.4  Ownership of Shares of BLCI. Schedule 3.4 shows the number of 
               ---------------------------
shares of BLCI Stock owned by the Company and each affiliate of the Company as
of the date hereof, and the percentage of shares of each class of BLCI's capital
stock outstanding owned by the Company as of the date hereof. All of the
outstanding shares of BLCI Stock shown on Schedule 3.4 as being owned by the
Company have been validly issued, are fully paid and nonassessable and are owned
by the Company free and clear of any liens or encumbrances of any nature, except
as otherwise disclosed in Schedule 3.4.

                                       4
<PAGE>
 
          3.5  Financial Statements. There have been delivered to the Purchaser
               --------------------
copies of the pro forma fair market value balance sheet (where applicable,
consolidated and combined) of The Prime Group, Inc. ("PGI") and its affiliates
(including the Company) listed on Schedule 3.5, prepared to reflect the proposed
reorganization (the "Reorganization") of the office and industrial division of
PGI and its affiliates into Prime Group Realty Trust as contemplated by the
S-11 registration statement of such entity filed with the Commission August 13,
1997, as amended by Amendment No. 1 thereto filed with the Commission on
September 12, 1997, and as may be further modified or amended by subsequent
amendments thereto. Such financial statements (including in each case the
related schedules and notes) fairly present in all material respects the pro
forma consolidated financial position of the Company as of the respective dates
specified in such financial statements on a fair market value basis.

          3.6  Compliance with Laws, Other Instruments, etc. The execution,
               --------------------------------------------
delivery and performance by the Company of this Agreement and the Note will not
(i) contravene, result in any breach of, or constitute a default under, or
result in the creation of any lien or other encumbrance in respect of any
property of the Company under, any indenture, mortgage, deed of trust, loan,
purchase or credit agreement, lease, certificate of limited partnership,
agreement of limited partnership, or any other material agreement or
instrument to which the Company is bound or by which the Company or any of
its properties is bound or affected, (ii) conflict with or result in a breach of
any of the terms, conditions or provisions of any order, judgment, decree, or
ruling of any court, arbitrator or governmental authority applicable to the
Company or (iii) violate any provision of any statute or other rule or
regulation of any governmental authority applicable to the Company.

          3.7  Governmental Authorizations, etc. No consent, approval or
               --------------------------------
authorization of, or, except as contemplated by the Registration Rights
Agreement, registration, filing or declaration with, any governmental
authority is required in connection with the execution, delivery or performance
by the Company of this Agreement or the Note.

          3.8  Litigation: Observance of Statutes and Orders. (a) Except
               ---------------------------------------------
as disclosed in Schedule 3.8, there are no actions, suits or proceedings
pending or, to the knowledge of the Company, threatened against or affecting the
Company or any property of the Company in any court or before any arbitrator
or before or by any governmental authority that, individually or in the
aggregate, would reasonably be expected to have a material adverse effect on
its business or financial condition. 

           (b)  The Company is not in default under any order, judgment, decree
or ruling of any court, arbitrator or governmental authority or in violation
of any applicable law, ordinance, rule or regulation (including without
limitation environmental laws) of any governmental authority, which default
or violation, individually or in the aggregate, would reasonably be expected to
have a material adverse effect on its business or financial condition.

                                       5
<PAGE>
 
          3.9  Taxes. The Company has filed all income tax returns that are 
               -----
required to have been filed in any jurisdiction, and have paid all taxes shown
to be due and payable on such returns and all other taxes and assessments
payable by it, to the extent such taxes and assessments have become due and
payable and before they have become delinquent, except for any taxes and
assessments (i) the amount of which is not individually or in the aggregate
material or (ii) the amount, applicability or validity of which is currently
being contested in good faith by appropriate proceedings and with respect to
which the Company has established adequate reserves therefor.

          3.10  Title to Property. The Company has good and sufficient title to
                -----------------
its properties, including all such properties reflected in the pro forma balance
sheet described in Section 3.5 as owned by the Company, in each case free and
clear of liens or encumbrances prohibited by this Agreement, except for those
defects in title and liens that, individually or in the aggregate, would not
have a material adverse effect on the Company's business or financial condition.

          3.11  Private Offering by the Company. Neither the Company nor anyone
                -------------------------------
acting on its behalf has taken, or will take, any action that would subject the
issuance or sale of the Note to the registration requirements of Section 5 of
the Securities Act.

          3.12  Use of Proceeds; Margin Regulations. The Company will apply the
                ---------------
proceeds of the sale of the Note only for purposes of working capital for the
Company, PGI and its affiliates. No part of the proceeds from the sale of the
Note hereunder will be used, directly or indirectly, for the "purpose of buying
or carrying" any "margin stock" within the meaning of Regulation G of the Board
of Governors of the Federal Reserve System (12 CFR 207) under such circumstances
as to involve the Company in a violation of Regulation G, T, or X of said Board
(12 CFR 207; 12 CFR 224; 12 CFR 220).

          3.13  Existing Indebtedness. Neither the Company nor, to the best of 
                ---------------------
the Company's knowledge, BLCI is in default and no waiver of default is
currently in effect, in the payment of any principal or interest on any
indebtedness of the Company and no event or condition exists with respect to any
indebtedness of the Company the outstanding principal amount of which exceeds
$10,000,000 that would permit (or that with notice or the lapse of time, or
both, would permit) one or more persons to cause such indebtedness to become due
and payable before its stated maturity or before its regularly scheduled dates
of payment.

          3.14  Other Fees. It is not obligated to pay any compensation or other
                ----------
fee, cost or related expenditure to any underwriter, broker, agent or other 
representative in connection with the transactions contemplated hereby. 

          3.15  Not Investment Company. The Company is not subject to regulation
                ----------------------
under the Investment Company Act of 1940, as amended.

                                       6
<PAGE>
 
4.        REPRESENTATIONS AND WARRANTIES OF THE PURCHASER.


          The Purchaser hereby makes the following representations and
warranties to the Company:

          4.1  Authorization; Enforceability. Purchaser is duly and validly
               -----------------------------
organized, validly existing and in good standing as a limited partnership under
the laws of the state of its organization with full power and authority to
purchase the Note and the Exchange Shares and to execute and deliver this
Agreement and the other Transaction Documents. This Agreement and the other
Transaction Documents each constitutes the Purchaser's valid and legally binding
obligation, enforceable in accordance with its terms, except as such enforcement
may be limited by (i) applicable bankruptcy, insolvency, reorganization,
moratorium or other similar laws affecting the enforcement of creditors' rights
generally and (ii) general principles of equity (regardless of whether such
enforceability is considered in a proceeding in equity or at law).
     
          4.2  Accredited Investor; Investment Intent. The Purchaser is (i) an
               --------------------------------------
accredited investor, as defined in Rule 501 of Regulation D under the Securities
Act, (ii) an institution and (iii) a "qualified institutional buyer" as
defined in Rule 144A under the Securities Act. The Purchaser is acquiring the
Note, and will be purchasing any Exchange Shares exchangeable therefor, solely
for the Purchaser's own account for investment purposes as a principal and not
with a view to the public resale or distribution of all or any part thereof;
provided, that in making such representation, the Purchaser does not agree to
hold the Note or the Exchange Shares for any minimum or specific term and
reserves the right to sell, transfer or otherwise dispose of the Note or the
Exchange Shares at any time in accordance with the provisions of this Agreement
and the Registration Rights Agreement and with Federal and state securities laws
applicable to any such sale, transfer or disposition.

          4.3  Information. The Company has provided the Purchaser with certain
               -----------
written information regarding the Company and has granted to the Purchaser the
opportunity to ask questions of and receive answers from representatives of
the Company, its officers, directors, employees and agents concerning the terms
and conditions of the purchase and sale of the Note, the Company and its
business and prospects.

          4.4  Limitations on Disposition. The Purchaser acknowledges that the
               --------------------------
Note has not been registered under the Securities Act or any state securities
laws and applicable rules and regulations, and may not be transferred unless and
until:
               
          (a)  there is then in effect a registration statement under the
Securities Act covering such proposed disposition and such disposition is made
in accordance with such registration statement; or


          (b)  an exception from the registration requirements of the Securities
Act is then available with respect to such proposed disposition and such
disposition is made in


                                       7
<PAGE>
 
accordance with such exemption. The Purchaser agrees that no such disposition
shall be made pursuant to this Section 4.4(b) unless (i) the Purchaser shall
have notified the Company in advance of the proposed disposition, and (ii) if
reasonably requested by the Company, the Purchaser shall have furnished the
Company with an opinion of counsel, reasonably satisfactory to the Company,
that such disposition will not require registration under the Securities Act.
It is agreed that no opinion of counsel will be required for the transfer of the
Note or any interest therein to an affiliate of the Purchaser or with respect to
a sale thereof made pursuant to Rule 144 under the Securities Act (or any
successor provision); provided, that prior to any sale made pursuant to Rule
144, the Purchaser will furnish to the Company, upon its request, a certificate
setting forth such representations as are customarily given by a selling
shareholder to the issuer in a Rule 144 transaction.

          4.5  Legend. The Purchaser understands that the Note shall bear at
               ------
issuance a restrictive legend in substantially the following form:

          "THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
          AS AMENDED, OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR
          SALE, SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS A REGISTRATION
          STATEMENT UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS SHALL BE
          EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM REGISTRATION
          UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS IS AVAILABLE IN
          CONNECTION WITH SUCH OFFER, SALE, TRANSFER OR DISPOSITION."

5.        COVENANTS OF THE COMPANY.

          The Company covenants that so long as the Purchaser or any affiliate
thereof beneficially owns the Note (or any interest therein) or any Exchange
Shares:
                                    
          5.1  Compliance with Law.  The Company will comply with all laws,
               -------------------
ordinances or governmental rules or regulations to which each of them is
subject, including, without limitation, environmental laws, and will obtain and
maintain in effect all licenses, certificates, permits, franchises and other
governmental authorizations necessary to the ownership of their respective
properties or to the conduct of their respective businesses, in each case to
the extent necessary to ensure that non-compliance with such laws, ordinances or
governmental rules or regulations or failures to obtain or maintain in effect
such licenses, certificates, permits, franchises and other governmental
authorizations would not reasonably be expected, individually or in the
aggregate, to have a materially adverse effect on its business or financial
condition.


                                       8
<PAGE>
 
          5.2  Existence.  The Company shall maintain its limited partnership
               ---------
existence and shall pay all its taxes when due except for taxes which it
reasonably disputes or which could not reasonably be expected to have a
materially adverse change on its consolidated business or financial condition.

          5.3  Provision of Information.  The Company shall provide the
               ------------------------
Purchaser, or shall cause the Purchaser to be provided, with copies of BLCI's
Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on
Form 8-K and proxy statements, in each such case promptly after filing thereof
with the Commission, until the exchange or redemption of the Note.

          5.4  Maintenance of Minimum Collateral.  (a)  As long as the Purchaser
               ---------------------------------
or any affiliate of Purchaser beneficially owns the Note (or any interest
therein), the Company shall at all times maintain pledged with the Purchaser, in
accordance with the provisions of the Security Agreement, such number of shares
of BLCI Stock or other Collateral as are required so that the aggregate Value
of the Collateral (as determined pursuant to the Security Agreement) is not less
than the Minimum Required Amount at any time. 

          (b)  On any day on which the Value of the Collateral pledged to the
Purchaser (as calculated pursuant to the Security Agreement) is less than the
Minimum Required Amount, the Company shall, within five (5) business days after
the Company's receipt of notice from the Purchaser to such effect, deliver and
pledge such additional shares of BLCI Stock or other Collateral with the
Purchaser as is necessary so that the Value of the Collateral pledged to or
otherwise under the control of Secured Party is not less than the Target Amount,
as computed on the date of, and after giving effect to, such delivery and
pledge.

          5.5  Use of Purchaser's Name.  The Company shall not use, directly or
               -----------------------
indirectly, the Purchaser's name in any advertisement, announcement, press
release or other similar communication unless it has received the prior written
consent of the Purchaser for the specific use contemplated. The Company will
consult with the Purchaser, and permit Purchaser's review, prior to making any
governmental or other filings describing the Purchaser.

          5.6  Company's Instructions to BLCI Transfer Agent.  The Company shall
               ---------------------------------------------    
at the Closing instruct the transfer agent for BLCI Stock (i) to issue
certificates representing the number of shares of BLCI Stock specified in each
duly issued Exchange Notice in the name of the Purchaser or its nominee as
provided in the terms of the Note, and (ii) to deliver such certificates to the
Purchaser no later than the close of business on the third (3rd) business day
following the Delivery Date (as defined in the Note); provided, that the Company
has not given written notice to such transfer agent of its objection to the
calculations in such Exchange Notice as provided in the terms of the Note. The
Company will provide the Purchaser with a written acknowledgment of such
transfer agent to act according to such instruction as promptly following the
Closing as practicable, and in any


                                       9

<PAGE>
 
case within 45 days thereof. The Company shall not give any instruction to such
transfer agent that will conflict with the foregoing instruction, or otherwise
restrict the Purchaser's right to exchange the Note or receive Exchange Shares
in accordance with the terms of the Note and the other Transaction Documents. In
the event BLCI's relationship with its transfer agent is terminated for any
reason, the Company shall give to the new transfer agent for BLCI Stock the same
instructions as provided above, and shall provide the Purchaser with such
transfer agent's written confirmation to so act.


6.        REGISTRATION OF BLCI STOCK

          6.1  Filing of Registration Statement.  The Company shall use its best
               --------------------------------
efforts to cause BLCI to prepare and file with the Commission, with sufficient
time to permit effectiveness thereof on or before the Registration Deadline, a
Registration Statement on such Form as is then available to effect a
registration of the Exchange Shares as a "shelf" registration statement under
Rule 415 covering the resale on a continuous basis of the Exchange Shares which
the Purchaser becomes entitled to receive pursuant to the Note (including upon
enforcement of its rights under the Security Agreement) in accordance with the
terms and conditions thereof.

          6.2  Obligation to Supply Information.  In connection with the
               --------------------------------
registration of shares BLCI Stock pursuant to a Registration Statement, the
Purchaser agrees to furnish to BLCI or the Company such information regarding
itself and the intended method of disposition of the shares of BLCI Stock to be
registered on its behalf as BLCI or the Company shall reasonably request in
order to effect the registration thereof or as needed for any post-effective
amendment to the Registration Statement or for any supplement to the prospectus
including therein.

          6.3  Stop Orders.  Upon receipt of any notice from BLCI of the
               -----------
happening of the issuance of any stop order or other order suspending the
effectiveness of the Registration Statement, the Purchaser shall discontinue
disposition of Registrable Shares (as defined in the Registration Rights
Agreement) pursuant to the Registration Statement until withdrawal of such stop
order.

          6.4  Standstill Periods.  If so requested by BLCI, and provided a
               ------------------
Registration Statement covering the sale of all of the Registrable Shares is
then effective, the Purchaser shall not sell or otherwise transfer pursuant to
any such Registration Statement (i) any Exchange Shares during the period from
the second (2nd) business day prior to the effective date of a registration
statement filed by BLCI under the Securities Act (other than a Registration
Statement hereunder) in connection with a public offering of BLCI Stock until
the thirtieth (30th) calendar day following such effective date, and (ii) any
Exchange Shares during the period from the date specified in a notice delivered
by BLCI, to the effect that because an event has occurred, as a result of which
the prospectus included in such Registration Statement then in effect contains
an untrue statement of a material fact (or omits


                                       10

<PAGE>
 
to state a material fact required to be stated therein or which is necessary to
make the statements therein not misleading in light of the circumstances then
existing), BLCI will delay the preparation and filing of an amendment or
supplement to the prospectus included in the Registration Statement until the
expiration date specified in such notice (each of the periods described in
clauses (i) and (ii) hereof, a "Standstill Period"). The Company agrees that,
upon the exchange of principal of or interest on the Note where the Exchange
Date therefor occurs after the expiration of a Standstill Period, then until
(and including) the tenth (10th) business day following the date of such
expiration, the Exchange Price therefor shall be the lesser of (A) the lowest
applicable Exchange Price in effect during the Standstill Period, and (B) the
applicable Exchange Price in effect on such Exchange Date.


7.        CONDITIONS TO CLOSING.

          7.1  Conditions to Purchaser's Obligations at Closing.  The
               ------------------------------------------------
Purchaser's obligations hereunder to purchase and pay for the Note are subject
to the satisfaction or waiver by the Purchaser of each of the following
conditions:

          (a)  the representations and warranties of the Company in this
Agreement shall be true and correct in all material respects as of the Closing
Date as if made on such date;

          (b)  the Company shall have complied with or performed, in all
material respects, all agreements, obligations and conditions set forth in this
Agreement required to be complied with or performed by it on or before the
Closing;

          (c)  each of the Transaction Documents shall have been executed by
each party thereto other than the Purchaser, and the Company shall have met all
required conditions precedent to the effectiveness thereof;

          (d)  the Company shall have delivered and pledged to the Purchaser the
number of shares of BLCI Stock required hereby and under the Security
Agreement, in the form required thereunder, having a Value of not less than one
hundred and twenty-five percent (125%) of the original principal amount of the
Note;

          (e)  the Company shall have delivered to the Purchaser a certificate,
signed by an officer of the Company, certifying that the conditions specified in
paragraphs (a), (b), (c) and (d) above have been fulfilled;

          (f)  the Company shall have delivered to the Purchaser opinions of
counsel for the Company, dated the Closing Date, covering the matters set forth
in Exhibit 7.1 in form reasonably satisfactory to Purchaser;


                                       11
<PAGE>
 
          (g)  the Company shall have delivered to the Purchaser (i) executed
copies of Financing Statements (Form UCC-1), in form suitable for filing under
the Uniform Commercial Code in such jurisdictions as may be necessary or
advisable to perfect the security interests created by the Security Agreement,
(ii) a lien search, dated as of recent date prior to the Closing, listing all
financing statements which name the Company as debtor and which are filed in the
jurisdictions referred to in (i) above, and (iii) executed copies of such
documentation as may be customarily required by an agent of the Purchaser
engaged to hold all or any of the Collateral;

          (h)  the Company shall have delivered to the Purchaser (i) an
assignment of registration rights under the Registration Rights Agreement from
the Company to the Purchaser, consented to by BLCI, and (ii) the written
confirmation of BLCI to a written request for demand registration rights by the
Purchaser pursuant to the Registration Rights Agreement; and

          (i)  there shall have been no material adverse changes in the
consolidated business or financial condition of PGI and its affiliates on a
combined basis since June 30, 1997 which have not been disclosed in writing to
the Purchaser.

          7.2  Conditions to Company's Obligations at Closing.  The Company's
               ----------------------------------------------
obligations hereunder to execute and deliver the Note against payment therefor
are subject to the satisfaction or waiver by the Company of each of the
following conditions:

          (a)  the representations and warranties of the Purchaser shall be true
and correct in all material respects as of the Closing Date as if made on such
date; and

          (b)  the Purchaser shall have complied with or performed all of the
agreements, obligations and conditions set forth in this Agreement that are
required to be complied with or performed by the Purchaser on or before the
Closing.


8.        INDEMNIFICATION.

          (a)  The Company agrees to indemnify and hold harmless the Purchaser
and its officers, directors, employees and agents, and each person who controls
the Purchaser within the meaning of the Securities Act or the Exchange Act
(each, a "Purchaser Indemnified Party") against any losses, claims, damages,
liabilities or reasonable out-of-pocket expenses (including the reasonable fees
and disbursements of counsel) as an incurred, joint or several, to which it,
they or any of them, may become subject and not otherwise reimbursed, arising
out of or in connection with the breach by the Company of any of its
representations, warranties or covenants made herein.

          (b)  The Purchaser agrees to indemnify and hold harmless the Company
and its officers, directors, employees and agents, and each person who controls
the Company


                                       12

<PAGE>
 
within the meaning of the Securities Act or the Exchange Act (each, a "Company
Indemnified Party") (the Purchaser Indemnified Party and a Company Indemnified
Party are each hereinafter referred to as an "Indemnified Party") against any
losses, claims, damages, liabilities or expenses (including the fees and
disbursements of counsel) as incurred, joint or several, to which it, they or
any of them, may become subject and not otherwise reimbursed, arising out of or
in connection with the breach by the Purchaser of any of its representations,
warranties or covenants made herein.

          (c)  Promptly after receipt by an Indemnified Party of notice of the
commencement of any action pursuant to which indemnification may be sought
hereunder, such Indemnified Party will, if a claim in respect thereof is to be
made against the other party (the "Indemnifying Party"), deliver to the
Indemnifying Party a written notice of the commencement thereof and the
Indemnifying Party shall have the right to participate in and to assume the
defense thereof with counsel reasonably selected by the Indemnifying Party that
is reasonably acceptable to the Indemnified Party; provided, that an Indemnified
Party shall have the right to retain its own counsel, with the reasonably
incurred fees and expenses of such counsel to be paid by the Indemnifying Party,
if representation of such Indemnified Party by the counsel retained by the
Indemnifying Party would be inappropriate due to actual or potential conflicts
of interest under applicable standards of professional conduct between such
Indemnified Party and any other party represented by such counsel in such
proceeding.  The failure to deliver written notice to the Indemnifying Party
within a reasonable time of the commencement of any such action will not relieve
the Indemnifying Party of any of its obligations hereunder with respect to such
action except to the extent such failure is prejudicial to the Indemnifying
Party's ability to defend any such action.

          (d)  No Indemnifying Party shall, without the prior written consent of
the Indemnified Party, effect any settlement of pending or threatened action in
respect of which an Indemnified Party is or could have been a party and
indemnity could have been sought hereunder by such Indemnified Party unless such
settlement includes an unconditional release of such Indemnified Party from all
liability on any claims that are the subject matter of such action. An
Indemnifying Party will not be liable for any settlement of any action or claim
effected without its written consent.


9.        MISCELLANEOUS

          9.1  Expenses.  Each of the Company and the Purchaser shall pay all
               --------
costs and expenses that it incurs in connection with the negotiation, execution,
delivery and performance of this Agreement; provided, that the Company shall
reimburse the Purchaser, on a periodic basis for Purchaser's costs of
maintaining the Collateral.

          9.2  Notices.  Any notice, demand or request required or permitted to
               -------
be given by the Company, or the Purchaser pursuant to the terms of this
Agreement shall be in writing and shall be deemed given (i) when delivered
personally or by verifiable facsimile


                                       13

<PAGE>
 
transmission (with a hard copy to follow) on or before 5:00 p.m., New York time,
on a business day or, if such day is not a business day, on the next succeeding
business day, (ii) on the next business day after timely delivery to a
nationally recognized overnight courier guarantying next day delivery, delivery
charges prepaid, and (iii) on the third business day after deposit in the U.S.
mail (certified or registered mail, return receipt requested, postage prepaid),
addressed to the parties as follows:

          If to the Company:

          The Prime Group, Inc.
          77 West Wacker Drive, Suite 3900
          Chicago, Illinois 60601
          Attn: Michael W. Reschke

          Tel: 312-917-4201
          Fax: 312-917-1511

          with a copy to:      

          The Prime Group, Inc.
          77 West Wacker Drive, Suite 3900
          Chicago, Illinois 60601
          Attn: Robert J. Rudnik, Esq.

          Tel: 312-917-4234
          Fax: 312-917-1684

          If to Purchaser:

          Och-Ziff Capital Management, L.P.
          153 East 53rd Street, 43rd Floor
          New York, New York 10022
          Attn: Joel Frank, Chief Financial Officer

          Tel: 212-292-5956    
          Fax: 212-292-5950

or to such other address as shall be designated by a party writing to the
others.

          9.3  Survival; Severability.  The representations, warranties,
               ----------------------
covenants and indemnities made by the parties herein shall survive the Closing
notwithstanding any due diligence investigation made by or on behalf of the
party seeking to rely thereon.  In the event that any provision of this
Agreement becomes or is declared by a court of competent jurisdiction to be
illegal, unenforceable or void, this Agreement shall continue in full force

                                      14
<PAGE>
 
and effect without said provision; provided, that in such case the parties shall
negotiate in good faith to replace such provision with a new provision which is
not illegal, unenforceable or void, as long as such new provision does not
materially change the economic benefits of this Agreement to the parties.

          9.4  Successors and Assigns.  The terms and conditions of this
               ----------------------
Agreement shall inure to the benefit of and be binding upon the respective
successors and assigns of the parties; provided, that the Company shall not
assign its right or obligations hereunder without the prior written consent of
Purchaser.  Nothing in this Agreement, express or implied, is intended to confer
upon any party other than the parties hereto or their respective successors and
assigns any rights, remedies, obligations or liabilities under or by reason of
this Agreement, except as expressly provided in this Agreement.  Purchaser may
assign its rights hereunder, in connection with any private sale or transfer of
the Note, so long as, as a condition precedent to such transfer, the transferee
executes an acknowledgment agreeing to be bound by the applicable provisions of
this Agreement, in which case the term "Purchaser" shall be deemed to refer to
such transferee as though such transferee were an original signatory hereto.

          9.5  Injunctive Relief.  The Company acknowledges that a breach by
               -----------------
it of its obligations hereunder may cause irreparable harm to the Purchaser and
that the remedy or remedies at law for any such breach may be inadequate and
agrees, in the event of any such breach, in addition to all other available
remedies, the Purchaser shall have the right to obtain equitable relief to
enforce this Agreement to the extent such relief is available.

          9.6  Counterparts.  This Agreement may be executed in any number of
               ------------
counterparts, each of which shall be deemed an original, and all of which
together shall constitute one and the same instrument.

          9.7  Failure to Exercise Rights Not Waiver.  No failure or delay on
               -------------------------------------
the part of the Purchaser in the exercise of any power, right or privilege
hereunder shall operate as a waiver thereof, nor shall any single or partial
exercise of any such power, right or privilege preclude any other or further
exercise thereof.  All rights and remedies of the Purchaser hereunder are
cumulative and not exclusive of any rights or remedies otherwise available.
 
          9.8  Entire Agreement; Amendments.  This Agreement, the Note and the 
               ----------------------------
other Transaction Documents constitute the entire agreement between the parties
with regard to the subject matter hereof and thereof, superseding all prior
agreements or understandings, whether written oral, between the parties.  Except
as expressly provided herein, neither this Agreement nor any term hereof may be
amended except pursuant to a written instrument executed by the Company and
the Purchaser, and no provision hereof may be waived other than by a written
instrument signed by the party against whom enforcement of any such waiver is
sought.

                                      15
<PAGE>

          9.9  Governing Law; Consent to Jurisdiction.  (a) This Agreement shall
               --------------------------------------
be governed by and construed in accordance with the substantive laws of the
State of New York, without giving effect to the choice of law provisions
thereof, except to the extent that the validity or perfection of the security
interest hereunder, or remedies hereunder, in respect of any particular
Collateral are governed by the laws of a jurisdiction other than the State of
New York.

          (b)  The Company hereby irrevocably agrees that, subject to
Purchaser's sole and absolute election, all actions or proceedings which in any
manner arise out of or in connection with or are in any way related to this
Agreement or the other Transaction Documents shall be litigated in courts
having situs within the County of New York, State of New York, and the Company
hereby consents to the jurisdiction of any state or federal court located with
the County of New York, State of New York.  The Company hereby waives any right
it may have to transfer or change the venue of any litigation between grantor
and purchaser in accordance with this paragraph.

          9.10  Waiver of Jury Trial.  EACH OF THE COMPANY AND PURCHASER HEREBY
                --------------------
KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY in
any action or proceeding which in any manner arises out of or in connection with
or is in any way related to this Agreement or any of the transactions
contemplated herein.  The provisions of this Section 9.10 are a material
inducement for Purchaser entering into this Agreement and the transactions
contemplated herein.  The Company hereby acknowledges that it has reviewed the
provisions of this Section 9.10 with its independent counsel.

          IN WITNESS WHEREOF, the parties hereto have executed this Purchase
Agreement as of the date first written above.

                                       PRIME GROUP VI, L.P.
                                       By: PGLP, Inc.
                                           its Managing General Partner

                                        By: /s/ Jeffrey A. Patterson
                                           ------------------------------
                                        Name:  Jeffrey A. Patterson
                                             ----------------------------
                                        Title: Vice President
                                              ---------------------------


                                       OCH-ZIFF CAPITAL MANAGEMENT, L.P.
                                       By: OCH-ZIFF ASSOCIATES, L.L.C.
                                           its General Partner

                                        By:  /s/ Daniel S. Och
                                             ---------------------------
                                        Name:  Daniel S. Och
                                        Title: Managing Member







                                      16
<PAGE>
 
                                                                       Exhibit A

                                 FORM OF NOTE

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND
APPLICABLE STATE SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN
EXEMPTION FROM REGISTRATION UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS
IS AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE, TRANSFER OR DISPOSITION. THIS
NOTE IS ISSUED SUBJECT TO THE TERMS OF A NOTE PURCHASE AGREEMENT, DATED AS OF
______________________, 1997 BY AND BETWEEN PRIME GROUP VI, L.P., AND THE
PURCHASER NAMED THEREIN.


                             PRIME GROUP VI, L.P.

                               EXCHANGEABLE NOTE

New York, New York                                                   $20,000,000
____________, 1997

          FOR VALUE RECEIVED, PRIME GROUP VI, L.P., an Illinois limited
partnership (the "Company"), HEREBY PROMISES TO PAY to the order of OCH-ZIFF
CAPITAL MANAGEMENT, L.P., a Delaware limited partnership (the "Purchaser"), or
its assigns, the sum of TWENTY MILLION DOLLARS ($20,000,000), in immediately
available funds, on or before___________, 2002 (the "Maturity Date"), and to pay
interest thereon from the date hereof (the "Issue Date"), as provided herein.

1.        DEFINITIONS.

          As used herein, in addition to the capitalized terms defined above,
capitalized terms not otherwise defined shall have the following meanings:

          (a)  "Applicable Percentage" has the meaning ascribed thereto in
Section 3.3.                                          

          (b)  "BLCI" means Brookdale Living Communities, Inc., a Delaware
corporation.

          (c)  "BLCI Stock" means the Common Stock, par value $0.01 per share,
of BLCI.

          (d)  "Closing Bid Price" means, with respect to a security, the
closing bid price of such security on the principal securities exchange or
trading market where such security is listed or traded as reported (i) if the
NASDAQ National Market is the principal market on which
<PAGE>
 
the BLCI Stock is then traded, by NASDAQ, (ii) if the New York Stock Exchange or
American Stock Exchange is the principal market on which the BLCI Stock is
then traded, by such respective exchange, (iii) if none of the NASDAQ National
Market or such exchanges is the principal market, by Bloomberg Financial
Markets, (iv) if Bloomberg Financial Markets is not then reporting closing bid
prices of such security, a comparable reporting service of national reputation
selected by the Company and reasonably acceptable to the Holder, (v) if the
foregoing does not apply, the last reported sale price of such security in the
over-the-counter market on the electronic bulletin board for such security as
reported by such reporting service, (vi) if no sale price is reported for such
security, the average of the bid prices of all market makers for such security
as reported in the "pink sheets" by the National Quotation Bureau, Inc., or
(vii) with respect to any security that does not constitute a security of the
type specified in the foregoing clauses, or otherwise for which no closing price
is published, the value of such security determined by the valuation method
agreed upon in writing by the Holder and the Company for such security prior to
such date. If the Closing Bid Price cannot be calculated for such security on
such date on any of the foregoing bases, the Closing Bid Price of such security
on such date shall be the fair market value as reasonably determined by an
investment banking firm selected by the Holder and acceptable to the Company
with the reasonable costs of such appraisal to be borne by the Company.

          (e) "Collateral" has the meaning ascribed thereto in the Security
Agreement.

          (f) "Default Rate" has the meaning ascribed thereto in Section 2.2.

          (g) "Delivery Date" has the meaning ascribed thereto in Section 3.4.

          (h) "Exchange" has the meaning ascribed thereto in Section 3.1.

          (i) "Exchange Conditions" has the meaning ascribed thereto in Section
3.4.

          (j) "Exchange Date" has the meaning ascribed thereto in Section 3.2.

          (k) "Exchange Default" has the meaning ascribed thereto in Section
3.5.

          (l) "Exchange Notice" has the meaning ascribed thereto in Section 3.2.

          (m) "Exchange Price" has the meaning ascribed thereto in Section 3.3.

          (n) "Exchange Shares" has the meaning ascribed thereto in Section 3.1.

          (o) "Floor Exchange Price" has the meaning ascribed thereto in Section
3.3.

          (p) "Holder" means the holder of this Note and its permitted assigns.

          (q) "Initial Exchange Date" has the meaning ascribed thereto in
Section 3.1.


                                       2
<PAGE>
 
          (r) "Mandatory Redemption" has the meaning ascribed thereto in Section
5.1.

          (s) "Mandatory Redemption Date" has the meaning ascribed thereto in
Section 5.1.

          (t) "Mandatory Redemption Event" has the meaning ascribed thereto in
Section 5.4.

          (u) "Mandatory Redemption Price" has the meaning ascribed thereto in
Section 5.2.

          (v) "Optional Redemption" has the meaning ascribed thereto in Section
4.1.

          (w) "Optional Redemption Date" has the meaning ascribed thereto in
Section 4.1

          (x) "Optional Redemption Price" has the meaning ascribed thereto in
Section 4.2.

          (y) "Purchase Agreement" means the Note Purchase Agreement, dated the
date hereof, by and between the Company and the Purchaser.

          (z) "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of May 7, 1997, among BLCI, The Prime Group, Inc., Prime
Group Limited Partnership and the Company, as amended by Amendment No. 1, dated
as of the date hereof (the "Registration Rights Agreement Amendment").

          (aa) "Registration Statement" means a registration statement or
statements in compliance with the Securities Act of 1933, as amended, and
pursuant to Rule 415 under the Securities Act or any successor rule providing
for the offering of securities on a continuous basis, covering the resale of the
Exchange Shares exchangeable hereunder, filed in accordance with the
Registration Rights Agreement.

          (ab) "Security Agreement" means the Pledge and Security Agreement,
dated the date hereof, by and between the Company and the Purchaser.

          (ac) "Standstill Period" has the meaning ascribed thereto in the
Purchase Agreement.

          (ad) "Trading Day" means any day on which the BLCI Stock is traded for
any period on the NASDAQ National Market System or on the principal securities
exchange or market on which the BLCI Stock is then traded.

          (ae) "Transfer Agent" means the transfer agent for BLCI Stock at any
time.

                                       3
<PAGE>
 
          (af) "Value" has the meaning ascribed thereto in the Purchase
Agreement.

          The following non-capitalized terms shall have the respective
following meanings: (i) an "affiliate" of a party shall mean any person or
entity controlling, controlled by or under common control with that party; and
(ii) a "business day" means any day other than a Saturday, Sunday or other day
on which the New York Stock Exchange and commercial banks in the cities of
Chicago and New York are authorized to close for business.

2.  INTEREST.

          2.1  Interest Rate. (a) This Note shall bear interest on the unpaid
               -------------
principal amount hereof, from the date hereof until such principal shall be paid
in full, at a rate of four percent (4%) per annum, computed on the basis of a
360-day year of twelve 30-day months, for the actual number of days elapsed.
Subject to Section 2.1(b), interest accrued hereunder shall be due and payable
quarterly in arrears commencing on December 31, 1997 and, thereafter, on the
last day of March, June, September and December, on an Optional Redemption Date,
on a Mandatory Redemption Date and on the Maturity Date, until the principal
hereof shall have been paid or redeemed in full. If any payment becomes due and
payable on a day other than a business day, the maturity thereof shall be
automatically extended to the next business day.

          (b) Any regular quarterly interest payable under Section 2.1(a) above
may, pursuant to election by the Company in its sole discretion, not be paid in
cash on the payable date therefor, in which event the unpaid interest shall be
compounded and added to the principal amount hereof on such date, and regular
interest on the principal amount of this Note, as so compounded, shall continue
to accrue thereafter in accordance with Section 2.1(a).

          2.2  Default Rate. This Note shall bear interest, to the extent
               ------------
permitted by law, on any overdue payment of principal, payment of interest
(other than compoundings of interest under Section 2.1(b)), or other amount
payable hereunder, payable quarterly on each regular interest payable date, or
at the option of the Holder, on demand, at a rate per annum (the "Default Rate")
from time to time equal to the greater of (i) fourteen percent (14%) or (ii) two
percent (2%) over the "prime" rate (as published in the Wall Street Journal)
on the relevant date of determination, but in any case not higher than the
highest rate permitted by applicable law, from the date of default until payment
in full.

3.  EXCHANGE.

          3.1  Right to Exchange. (a) Subject to the limitation contained in
               -----------------
Section 3.6 below, the Holder shall have the right to exchange the outstanding
unpaid principal of, and accrued interest on, this Note from time to time, as
specified herein, on and after __________, 1998 (the "Initial Exchange Date")
into fully paid and non-assessable shares of BLCI Stock ("Exchange Shares"),
free and clear of any liens, claims, encumbrances or restrictions on

                                       4
<PAGE>
 
transfer (other than with respect to applicable state and federal securities
laws) on transfer, in accordance with the terms hereof (an "Exchange").

          (b) On and following the Initial Exchange Date, the Holder shall be
entitled to exchange up to twenty-five percent (25%) of the original principal
amount hereof, together with compoundings of interest pursuant to Section 2.1(b)
and accrued but unpaid interest on such aggregate principal amount. Thereafter,
the Holder shall be entitled to exchange up to a further twenty-five percent
(25%) of the original principal amount hereof, together with compoundings of
interest pursuant to Section 2.1(b) and accrued but unpaid interest thereon, on
each second-month anniversary of the Initial Exchange Date until May 15, 1999.
Subject to the limitation in Section 3.6, the Holder shall be entitled to
cumulate the amount of the principal outstanding under this Note, and accrued
but unpaid interest thereon, which the Holder becomes entitled to exchange, but
does not exchange, pursuant to this Section 3.1(b).

          3.2  Exchange Notice. (a) In order to exchange any portion of the
               ---------------
principal of, and accrued interest on, this Note, the Holder shall send by
facsimile transmission, at any time prior to 8 p.m., New York time, on the date
on which the Holder wishes to effect such Exchange (the "Exchange Date"), a
notice of exchange in the form of Exhibit B hereto (an "Exchange Notice") to the
Company and to the Transfer Agent, stating (i) the principal amount of the Note
to be exchanged, including compoundings of interest pursuant to Section 2.1(b),
which amount shall not be less than $100,000 (or such lesser amount remaining
unpaid on the final Exchange Date), (ii) the amount of interest accrued on the
then unpaid principal balance of the Note, up to and including the Exchange
Date, (iii) the applicable Exchange Price, and (iv) a calculation of the number
of shares of BLCI Stock to be delivered on such Exchange. The Holder shall not
be required physically to surrender this Note to the Company or to the Transfer
Agent in order to effect an Exchange; provided, however, that the amounts
outstanding under this Note shall automatically be reduced by the amounts of any
such portion of the principal and accrued interest exchanged for Exchange Shares
pursuant to this Section 3.

          (b) The Company shall maintain a record showing, at any given time,
the unpaid principal amount of this Note, the accrued but unpaid interest
thereon, and the date of each Exchange or other payment of principal hereof. The
Holder shall amend Exhibit A hereto on any such Exchange or payment of principal
to reflect the unpaid principal amount hereof; provided, that the failure to do
so shall not affect the Company's obligations hereunder.

          3.3 Number of Exchange Shares; Exchange Price. The number of Exchange
              -----------------------------------------
Shares exchangeable by the Holder pursuant to an Exchange shall be equal to (x)
the aggregate  amount of principal of this Note specified for exchange in the
Exchange Notice, together with accrued but unpaid interest thereon, divided (y)
by the Exchange Price in effect on the Exchange Date. The "Exchange Price" as
of an Exchange Date shall be the product of (m) the Applicable Percentage times
(n) the average of the Closing Bid Prices for BLCI Stock on the seven (7)
Trading Days occurring immediately prior to (but not including) such Exchange
Date; provided, that if the Exchange Price as so determined is less than $17.60
(as adjusted for stock splits, stock dividends, etc., the "Floor Exchange
Price"), the Company shall be entitled to effect an

                                       5
<PAGE>
 
Optional Redemption pursuant to Section 4.1. The "Applicable Percentage" for
purposes of calculation of the Exchange Price shall mean eighty-eight percent
(88%).

          3.4  Delivery of Exchange Shares. (a) Provided that the Company does
               ---------------------------
not make written objection to an Exchange Notice by 8:00 p.m., New York time, on
the business day following the delivery thereof, and provided that the Exchange
Conditions are satisfied at such time, the Holder shall send for re-registration
to the Transfer Agent on or following the Exchange Date set forth in such
Exchange Notice (the "Delivery Date") certificate(s) for BLCI Stock sufficient
to permit the issuance to the Purchaser or its nominee of the number of Exchange
Shares specified in the Exchange Notice. The "Exchange Conditions" to be met on
each Delivery Date are as follows: (i) the Company shall not have given notice
to the Holder that the Registration Statement is not effective and available for
resales of the Exchange Shares at such time; (ii) the BLCI Stock is then
designated for quotation on the NASDAQ National Market System or listed on the
New York Stock Exchange or the American Stock Exchange; and (iii) the Holder
holds Collateral, after delivery of the Exchange Shares identified by the
Exchange Notice, with a Value greater than the Minimum Required Amount (as
defined in the Security Agreement).

          (b) If any Exchange would create a fractional Exchange Share, such
fractional Exchange Share shall be disregarded and the number of Exchange Shares
to be delivered on such Exchange, in the aggregate, shall be the next higher
number of Exchange Shares; provided, that in any such case of fractional
Exchange Share adjustment, the principal outstanding under this Note shall be
further automatically reduced, at the Exchange Price, to reflect delivery of the
balance of the fractional Exchange Share.

          (c) In the case of a dispute as to the calculation of the Exchange
Price or the number of Exchange Shares to be delivered on an Exchange, the
Transfer Agent shall re-register into the name of the Purchaser or its nominee
the number of Exchange Shares that are not disputed, and the Company shall
submit the disputed calculations to Ernst & Young, 787 Seventh Avenue, New York,
New York 10019, Attn: Larry Statsky, within two (2) business days of receipt of
the Holder's Exchange Notice. Such accountants shall calculate the Exchange
Price as provided herein, and notify the Company and the Holder of the results
in writing no later than two (2) business days following the day on which the
Company received the disputed calculations. Such accountants' calculation shall
be deemed conclusive in the absence of manifest error. The fees of any such
accountants shall be borne by the Company, unless such accountants' calculation
agrees with the calculation(s) asserted by the Company in such dispute to be
true, in which case such fees shall be borne by the Purchaser.

          3.5  Failure to Deliver Exchange Shares. The failure of the Holder to
               ----------------------------------
deliver certificates for re-registration due to failure of an Exchange
Condition, or the failure of the Transfer Agent to deliver to the Holder the
number of Exchange Shares specified in the applicable Exchange Notice within
three (3) business days of the Delivery Date therefor shall constitute an
"Exchange Default".

                                       6
<PAGE>
 
          3.6  Limitation on Right to Exchange. In no event shall the Holder be
               -------------------------------
permitted to exchange the outstanding principal of this Note, or accrued but
unpaid interest thereon, in excess of an amount which, on Exchange for shares of
BLCI Stock, and aggregation with other shares of BLCI Stock then beneficially
owned by the Holder (other than shares which deemed beneficially owned but for
the limitation of this Section 3.6), would equal or exceed 5.0% of the total
number of shares of BLCI Stock then issued and outstanding. The determination of
whether the limitation of this Section 3.6 applies, and whether principal of,
and accrued interest on, this Note is exchangeable (in relation to other
securities owned by the Holder) shall be in the reasonable discretion of the
Holder, and the submission of an Exchange Notice shall be deemed to constitute
the Holder's determination that such limitation does not apply. In the event
that the limitation contained in this Section 3.6 applies to all or a portion of
the unpaid principal amount of this Note, nothing contained herein shall be
deemed to restrict the right of the Holder to exchange such principal amount at
any later time when such Exchange will no longer violate such limitation.

          3.7  Required Exchange. If any principal amount of the Note remains
               -----------------
outstanding and unpaid on the third anniversary of the Issue Date, the Company
may require the Exchange thereof (but only if the Registration Statement is then
effective covering all Exchange Shares receivable in such Exchange), together
with accrued but unpaid interest thereon, into shares of BLCI Stock by delivery
of a notice to such effect to the Holder, substantially in the form of Exhibit B
hereto with appropriate modifications to indicate that the Company is exercising
its rights to require Exchange of the Note pursuant to this Section 3.7. The
Exchange Price for Exchange Shares in such a required Exchange shall be
determined in accordance with Section 3.3, without provision for an Optional
Redemption in case the Closing Bid Price falls below the Floor Exchange Price.

4.        OPTIONAL REDEMPTION BY THE COMPANY.

          4.1  Optional Redemption. The Company shall have the right, in its
               -------------------        
sole discretion, to redeem (an "Optional Redemption") all or a portion of the
aggregate amount of principal of this Note, together with accrued but unpaid
interest thereon, as follows:

               (i)  If on the date of delivery of any Exchange Notice the
          Exchange Price for BLCI Stock is less than the Floor Exchange Price,
          the Company shall have the right to effect an Optional Redemption of
          the principal amount, and accrued interest thereon, sought to be
          exchanged by the Holder as of such Exchange Date, at the Optional
          Redemption Price therefor on the date ten (10) days after the proposed
          Exchange Date, or first business day thereafter (an "Optional
          Redemption Date" with respect to an Exchange Date). The Company must
          exercise its right to effect such Optional Redemption by written
          notice thereof given to the Holder, on or before 8:00 p.m., New York
          time, on the next business day following the date of delivery of such
          Exchange Notice. Notice of

                                       
                                       7

<PAGE>
 
          such Optional Redemption, once given, shall obligate the Company to
          make the Optional Redemption specified therein.

               (ii) If a Standstill Period continues for more than ninety (90)
          days, the Company shall have the right to effect an Optional
          Redemption of the unpaid principal amount of this Note at the Optional
          Redemption Price therefor on the date ten (10) days after the delivery
          of written notice to such effect, or first business day thereafter (an
          "Optional Redemption Date" with respect to a Standstill Period);
          provided, that the Purchaser shall be entitled to receive as Exchange
          Shares, calculated at the Exchange Price therefor, as Purchaser may be
          eligible to purchase on such date, with a pro tanto reduction in the
          Optional Redemption Price payable on such date. The Company must
          exercise its right to effect such Optional Redemption by written
          notice thereof given to the Holder, on or before 8:00 p.m., New York
          time, within ten (10) business days following the termination of such
          90 day period. Notice of such Optional Redemption, once given, shall
          obligate the Company to make the Optional Redemption specified
          therein.

          4.2  Optional Redemption Price. (a) The "Optional Redemption Price"
               -------------------------
payable with respect to any Optional Redemption shall be (x) (i) in the case of
an Exchange Date Optional Redemption, the portion of the original principal
amount of this Note sought to be exchanged in such Exchange Notice (i.e.,
excluding compoundings of interest pursuant to Section 2.1(b)), or (ii) in the
case of a Standstill Period Optional Redemption, the unpaid principal amount of
this Note, as reduced to permit the Exchange of Shares provided by Section 
4.1 (ii), multiplied by (y) fourteen percent (14%) per year, in either case from
and including the Issue Date to but excluding the date of payment of the
Optional Redemption Price, compounded annually, for the actual number of days
elapsed.

          (b)  The Company shall pay the Optional Redemption Price to the
Holder, in immediately available funds, on the Optional Redemption Date for such
Optional Redemption. If the Company fails to pay the Optional Redemption Price
to the Holder on the Optional Redemption Date, then the Holder shall be entitled
to interest on the unpaid portion of such redemption payment at the Default Rate
from the Optional Redemption Date until the Optional Redemption Price and all
accrued interest thereon is paid in full. In the event the Company redeems the
entire remaining unpaid principal amount of this Note, together with all
interest accrued thereon and all other amounts due in connection therewith, the
Holder shall return this Note to the Company for cancellation.

5.        MANDATORY REDEMPTION BY THE COMPANY.

          5.1  Mandatory Redemption. In the event that a Mandatory Redemption
               --------------------
Event occurs, the Holder shall have the right, on written notice to the Company,
to have all or any portion of the unpaid principal amount of this Note redeemed
by the Company (a "Mandatory

                                       8
<PAGE>
 
Redemption") at the Mandatory Redemption Price, in immediately available funds.
Such notice shall specify the effective date of such Mandatory Redemption, which
shall be a business day, not less than ten (10) days following the date such
notice is given (the "Mandatory Redemption Date"), and the amount of principal
to be redeemed.

          5.2  Mandatory Redemption Price. The "Mandatory Redemption Price"
               --------------------------
shall be (x) the original principal amount of this Note (i.e., excluding
compoundings of interest pursuant to Section 2.1(b)) then remaining unpaid and
outstanding (unless a lesser amount is specified) multiplied by (y) fourteen
percent (14%) per year, compounded annually, from and including the Issue Date
to but excluding the date of payment of the Mandatory Redemption Price, without
deduction or offset of any kind.

          5.3  Payment of Mandatory Redemption Price. The Company shall pay the
               -------------------------------------
Mandatory Redemption Price to the Holder on the Mandatory Redemption Date. In
the event that the Company redeems the entire remaining unpaid principal amount
of this Note, and pays to the Holder all interest accrued thereon and all other
amounts due in connection therewith, the Holder shall return this Note to the
Company for cancellation. If Company fails to pay the Mandatory Redemption Price
to the Holder on the Mandatory Redemption Date, the Holder shall be entitled to
interest on the unpaid portion at the Default Rate from such date until the
Mandatory Redemption Price, and all accrued interest thereon, is paid in full.

          5.4  Mandatory Redemption Event. Each of the following events shall be
               --------------------------
deemed a "Mandatory Redemption Event":

          (a)  an Exchange Default occurs and continues for five (5) business
days, during which time the Company has not elected to make an Optional
Redemption of the principal amount and accrued interest subject to the Exchange
Notice;

          (b)  the Company fails to pay an Optional Redemption Price within five
(5) business days of the date required;

          (c)  the Company fails to deposit with the Holder any additional
shares of BLCI Stock or other Collateral required pursuant to the Purchase
Agreement or the Security Agreement, within five (5) business days of the date
required;

          (d)  the Company breaches, in a material respect, any covenant or
other material term or condition of this Note, the Purchase Agreement, the
Security Agreement, or any other agreement, certificate or instrument
delivered by the Company in connection therewith, other than as elsewhere
specified in this Section 5.4, and such breach continues for a period of ten
(10) business days after the earlier of (i) an executive officer of the Company
obtaining actual knowledge of such default, and (ii) the Company receiving
written notice of such default from the Holder;

                                       9
<PAGE>
 
          (e)  the Registration Statement is not declared effective on or prior
 to the Registration Deadline (as defined in the Purchase Agreement) or if the
 Registration Statement has been declared effective by such date, and the
 effectiveness of the Registration Statement lapses for any reason (including
 without limitation, the issuance of a stop order) or is unavailable to cover
 the resale of Exchange Shares in accordance with the terms of the Registration
 Rights Agreement, and such lapse or unavailability continues for a period of
 five (5) business days; provided, that the cause of such lapse or
 unavailability is not due to factors solely within the control of the Holder;
 and provided, further, that the Registration Statement shall not be deemed to
 have lapsed or to be unavailable, for purposes of this Section 5.4 only, during
 any Standstill Period (as defined in the Purchase Agreement with a duration of
 less than thirty (30) days);

          (f)  any representation or warranty made in writing by or on behalf of
the Company or by any officer of the Company furnished in connection with the
transactions contemplated hereby proves to have been false or incorrect in any
material respect on the date as of which made; 

          (g) (i) the Company is in default (as principal or as guarantor or
other surety) in the payment of any principal of or interest on any indebtedness
that is outstanding in an aggregate principal amount of at least $1,000,000
beyond any period of grace provided with respect thereto, or (ii) the Company is
in default in the performance of or compliance with any term of any evidence of
any indebtedness in an aggregate outstanding principal amount of at least
$1,000,000 or of any mortgage, indenture or other agreement relating thereto, or
any other condition exists, and as a consequence of such default or condition
such indebtedness has become, or has been declared due and payable before its
stated maturity or before its regularly scheduled dates of payment; or

          (h)  (i) BLCI Stock is delisted at any time from trading on the NASDAQ
National Market System, the New York Stock Exchange or the American Stock
Exchange, or (ii) Closing Bid Prices for BLCI Stock are unavailable for five
consecutive Trading Days on the NASDAQ National Market System or either such
exchange; or

          (i) the sale, conveyance or disposition of all or substantially all of
the assets of the Company, the effectuation of a transaction or series of
transactions, in which more than fifty percent (50%) of the voting power of the
Company is disposed of, or the consolidation, merger or other business
combination of the Company with or into any other entity, immediately following
which the prior stockholders of the Company fail to own, directly or indirectly,
at least fifty percent (50%) of the surviving entity; or

          (j)  the Company (i) is generally not paying, or admits in writing its
inability to pay, its debts as they become due, (ii) files, or consents by
answer or otherwise to the filing against it of, a petition for relief or
reorganization or arrangement or any other petition in bankruptcy, for
liquidation or to take advantage of any bankruptcy, insolvency, reorganization,
moratorium or other similar law of any jurisdiction, (iii) makes an assignment
for the benefit of its creditors, (iv) consents to the appointment of a
custodian, receiver, trustee or other officer

                                      10
<PAGE>
 
with similar powers with respect to it or with respect to any substantial part
of its property, (v) is adjudicated as insolvent or to be liquidated, or (vi)
takes corporate action for the purpose of any of the foregoing; or

          (k)  a court or governmental authority of competent jurisdiction
enters an order appointing, without consent by the Company, a custodian,
receiver, trustee or other officer with similar powers with respect to it or
with respect to any substantial part of its property, or constituting an order
for relief or approving a petition for relief or reorganization or any other
petition in bankruptcy or for liquidation or to take advantage of any bankruptcy
or insolvency law of any jurisdiction, or ordering the dissolution, winding-up
or liquidation of the Company or any such petition shall be filed against the
Company and such petition shall not be dismissed within 60 days; or

          (l)  a final judgment or judgments for the payment of money
aggregating in excess of $1,000,000 are rendered against the Company which
judgment is not, within 60 days after entry thereof, bonded, discharged or
stayed pending appeal, or are not discharged within 60 days after the
expiration of such stay.

          5.5  Failure to Pay Redemption Amounts. If the Company fails to pay
               ---------------------------------
the Mandatory Redemption Price on the Mandatory Redemption Date, then the Holder
shall have the right (but not the obligation) at any time, so long as the
Company remains in default, to require the Transfer Agent, on written notice,
promptly to register in the name of the Holder (or its designee), and deliver to
the Holder, the number of shares of BLCI Stock equal to (x) the outstanding
principal amount of this Note subject to Mandatory Redemption, together with
compoundings of interest at the rate and as provided pursuant to Section 2.1(b),
divided by (y) (i) eighty-three percent (83%) times (ii) the average of the
Closing Bid Prices for BLCI Stock on the seven (7) Trading Days occurring
immediately prior to (but not including) the Mandatory Redemption Date;
provided, that if the Registration Statement is not in effect on the date of
such notice, or ceases to be in effect at any time during the thirty (30) day
period thereafter, the Holder may require the Transfer Agent, on written notice,
promptly to register in the name of the Holder (or its designee), and deliver to
the Holder, such additional number of shares of BLCI Stock as shall be required
to permit the aggregate number of shares delivered to the Holder under this
Section 5.5 to equal (x) the outstanding principal amount of this Note subject
to Mandatory Redemption, together with compoundings of interest at the rate
and as provided pursuant to Section 2.l(b), divided by (y) (i) seventy percent
(70%) times (ii) the average of the Closing Bid Prices for BLCI Stock on the
seven (7) Trading Days occurring immediately prior to (but not including) the
Mandatory Redemption Date. Upon the expiry of such 30 day period, the delivery
of the shares of BLCI Stock required pursuant to this Section 5.5 shall
discharge the Company's obligation to pay the Mandatory Redemption Price
otherwise due on the Mandatory Redemption Date.


                                      11
<PAGE>
 
6.        MISCELLANEOUS.

          6.1 Lost or Stolen Note. On receipt by the Company of evidence of the
              -------------------
loss, theft, destruction or mutilation of this Note, and (in the case of loss,
theft or destruction) of indemnity or security reasonably satisfactory to the
Company, and on surrender and cancellation of the Note, if mutilated, the
Company shall execute and deliver to the Holder a new note identical in all
respects to this Note. On the issuance of any new Note hereunder, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge and any expenses (including reasonable fees and expenses of
counsel) in connection therewith.

          6.2 Notices. Any notice, demand or request required or permitted to be
              -------
given by the Company or the Holder pursuant to the terms of this Note shall be
in writing and shall be deemed given when delivered personally or by verifiable
facsimile transmission (with a hard copy to follow by nationally recognized air
courier) or on the next business day after timely delivery to a nationally
recognized overnight courier, guarantying next day delivery, delivery charges
prepaid, or sent by registered or certified mail, return receipt requested,
postage prepaid, to the following addresses:

          If to the Company:
          
          Prime Group VI, L.P.               
          c/o The Prime Group, Inc.          
          77 West Wacker Drive, Suite 3900   
          Chicago, Illinois 60601            
          Attn: Michael W. Reschke           
                                             
          Tel: 312-917-4201                  
          Fax: 312-917-1511                  
                                             
          with a copy to:                    

          
          Prime Group, Inc.                
          77 West Wacker Drive, Suite 3900  
          Chicago, Illinois 60601           
          Attn: Robert J. Rudnik, Esq.      
                                            
          Tel: 312-917-4234                 
          Fax: 312-917-1684                 
                                            
          with a copy to:                    

          Winston & Strawn

                                      12



<PAGE>
 
          35 West Wacker Drive                       
          Chicago, Illinois 60601                  
          Attn: Wayne D. Boberg, Esq.              

          Tel: 312-558-5600                        
          Fax: 312-558-5700                        

          If to the Holder:                        

          Och-Ziff Capital Management, L.P.        
          153 East 53rd Street, 43rd Floor         
          New York, New York 10022                 
          Attn: Joel Frank, Chief Financial Officer

          Tel: 212-292-5956                        
          Fax: 212-292-5950                         

or at such other address or facsimile number as the Holder shall have furnished
to the Company in accordance with this Section 6.2.

          6.3  Successors and Assigns. Holder may assign its rights hereunder,
               ----------------------
in connection with any private sale or transfer of the Note, so long as, as a
condition precedent to such transfer, the transferee executes an acknowledgment
agreeing to be bound by the applicable provisions of this Note, in which case
the term "Holder" shall be deemed to refer to such transferee; provided, that
the Company's consent shall in any case not be required (but the Company shall
nonetheless be entitled to receive written notice thereof) in the event of a
sale, transfer or disposition of this Note to an affiliate of the Holder. From
and after the date of such sale, transfer or disposition, the transferee hereof
shall be deemed to be the Holder. On any such sale, transfer or disposition, the
Company shall, promptly following the return of this Note by the transferee
hereof, issue and deliver to such transferee a new Note identical in all
respects to this Note, in the name of such transferee, except that the principal
amount of such new Note may reflect the unpaid principal amount of this
Note at the time of such sale, transfer or disposition.   

          6.4  Injunctive Relief. The Company acknowledges that a breach by it
               -----------------
of its obligations hereunder may cause irreparable harm to the Holder and that
the remedy or remedies at law for any such breach may be inadequate and agrees,
in the event of any such breach, in addition to all other available remedies,
the Holder shall have the right to obtain equitable relief to enforce this Note.

          6.5  Failure to Exercise Rights Not Waiver. No failure or delay on the
               -------------------------------------
part of the Holder in the exercise of any power, right or privilege hereunder
shall operate as a waiver thereof, nor shall any single or partial exercise of
any such power, right or privilege preclude


                                      13
<PAGE>
 
any other or further exercise thereof. All rights and remedies of the Holder
hereunder are cumulative and not exclusive of any rights or remedies otherwise
available.

          6.6  Amendments. Except as expressly provided herein, neither this
               ----------
Note nor any term hereof may be amended except pursuant to a written instrument
executed by the Company and the Holder, and no provision hereof may be waived
other than by a written instrument signed by the party against whom enforcement
of any such waiver is sought.

          6.7  Governing Law; Consent to Jurisdiction. (a) This Note shall be
               --------------------------------------
governed by and construed in accordance with the substantive laws of the State
of New York, without giving effect to the choice of law provisions thereof,
except to the extent that the validity or perfection of the security interest
hereunder, or remedies hereunder, in respect of any particular Collateral are
governed by the laws of a jurisdiction other than the State of New York.

          (b)  The Company hereby irrevocably agrees that, subject to Holder's
sole and absolute election, all actions or proceedings which in any manner arise
out of or in connection with or are in any way related to this Note or other
related agreements shall be litigated in courts having situs within the County
of New York, State of New York, and the Company hereby consents to the
jurisdiction of any state or federal court located with the County of New York,
State of New York. The Company hereby waives any right it may have to transfer
or change the venue of any litigation between grantor and purchaser in
accordance with this paragraph.

          6.8  Waiver of Jury Trial. THE COMPANY HEREBY KNOWINGLY, VOLUNTARILY
               --------------------
AND INTENTIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY in any action or proceeding
which in any manner arises out of or in connection with or is in any way related
to this Note or any of the transactions contemplated herein.

          IN WITNESS WHEREOF, the Company has caused this Note to be executed in
its name by its duly authorized officer on the date first above written.

                                               
                                        PRIME GROUP VI, L.P. 
                                        By: PGLP, Inc.                       
                                            its Managing General Partner     
                                                                             
                                            By:                              
                                                ---------------------------  
                                            Name:                            
                                                  -------------------------  
                                            Title:                           
                                                   ------------------------  


                                      14
<PAGE>
 
                                                                       Exhibit A

                             Schedule of Principal
                 Payments, Interest Compoundings and Exchanges
 


                          Amount Paid,
Principal                 Compounded interest       Date of Payment, Compounding
Balance                   or Amount Exchanged       or Exchange


$20,000,000               ___________________       ___________________       



                                      A-1
<PAGE>

 
                            NOTE PURCHASE AGREEMENT
                            -----------------------

                                 SCHEDULE 3.4
                          OWNERSHIP OF SHARES OF BLCI
                          ---------------------------



 
                                                              APPROXIMATE     
                            NUMBER OF SHARES                 PERCENTAGE OF    
ENTITY                      OF STOCK OF BLCI     CLASS     SHARES OUTSTANDING  
- ------                      ----------------    ------     ------------------ 
Prime Group VI, L.P.            2,500,000       Common           34.84%       
The Prime Group, Inc.           1,382,410/1/    Common           19.27%       
Prime Group Limited               320,633       Common            4.47%       
Partnership                 

                                       

- -----------------------

  /1/ 112,500 Shares are subject to options and 25,000 shares are subject to a 
      purchase right.
<PAGE>

                            NOTE PURCHASE AGREEMENT
                            -----------------------

                               SCHEDULE 3.5     

                   FINANCIAL STATEMENTS PREVIOUSLY DELIVERED
                   -----------------------------------------   


1.   The Prime Group, Inc. & Consolidated Affiliates Fair Market Value Balance
     Sheets, as of September 5, 1997 (Unaudited).

2.   The Prime Group, Inc. & Affiliates Fair Market Value Balance Sheet
     (Proforma Post Office REIT), as of September 24, 1997 (Unaudited).

3.   The Prime Group, Inc. and Subsidiaries Consolidated Balance Sheet, as of
     June 30, 1997, Consolidated Statement of Operations for the three months
     ended June 30, 1997 and for the six months ended June 30, 1997,
     Consolidated Statement of Changes in Stockholder's Deficit for the six
     months ended June 30, 1997, and Consolidated Statement of Cash Flows, for
     the three months ended June 30, 1997 and for the six months ended June 30,
     1997 (Unaudited).

4.   Prime Group Limited Partnership and Subsidiary Consolidated Balance Sheet,
     as of June 30, 1997, Consolidated Statement of Operations for the three
     months ended June 30, 1997 and for the six months ended June 30, 1997,
     Consolidated Statement of Partners' Deficit for the six months ended June
     30, 1997, and Consolidated Statement of Cash Flows, for the three months
     ended June 30, 1997 and for the six months ended June 30, 1997 (Unaudited).

5.   PGLP, Inc. Balance Sheet, as of June 30, 1997, Statements of Operations,
     for the three months ended June 30, 1997 and for the six months ended June
     30, 1997, Statement of Changes in Stockholder's Deficit for the six months
     ended June 30, 1997, and Statements of Cash Flow, for the three months
     ended June 30, 1997 and for the six months ended June 30, 1997 (Unaudited).

6.   Prime Group II, L.P. Consolidated Balance Sheet, as of June 30, 1997,
     Consolidated Statement of Operations for the three months ended June 30,
     1997 and for the six months ended June 30, 1997, Consolidated Statement of
     Changes in Stockholder's Deficit for the six months ended June 30,
     1997, and Statements of Cash Flow, for the three months ended June 30, 1997
     and for the six months ended June 30, 1997 (Unaudited).

7.   Prime International, Inc. And Subsidiaries Consolidated Balance Sheet, as
     of December 31, 1996 and December 31, 1995, Consolidated Statement of
     Operations for the years ended December 31, 1996 and December 31, 1995,
     Consolidated Statement of Changes in Stockholder's Deficit for the years
     ended December 31, 1996 and December 31, 1995, and Consolidated Statement
     of Cash Flows, for the years ended December 31, 1996 and December 31, 1995
     (Unaudited).

8.   Consolidated Financial Statements, The Prime Group, Inc. and Subsidiaries,
     Years ended
 
                
<PAGE>
 
     December 31, 1996 and 1995 with Report of Independent Auditors (Preliminary
     and unaudited).

9.   Consolidated Financial Statements, Prime Group Limited Partnership and
     Subsidiaries, Years ended December 31, 1996 and 1995 with Report of
     Independent Auditors (Preliminary and unaudited).

10.  Financial Statements, PGLP, Inc., Years ended December 31, 1996 and 1995
     with Report of Independent Auditors (Preliminary and unaudited).

11.  Financial Statements, Prime Group II, L.P., Years ended December 31, 1996
     and 1995 with Report of Independent Auditors (Preliminary and unaudited).


<PAGE>
 
                            NOTE PURCHASE AGREEMENT
                            -----------------------
                            
                                 SCHEDULE 3.8
                                
                               LITIGATION, ETC.



NONE

<PAGE>
 
                                                                       Exhibit B
                            FORM OF EXCHANGE NOTICE

                                    [date]


Prime Group VI, L.P.
c/o The Prime Group, Inc.
77 West Wacker Drive, Suite 3900
Chicago, Illinois 60601
Attn: Michael W. Reschke

[address of Transfer Agent]

          Re: Exchange of Note
              ----------------

Gentlemen:

          This is with reference to the Exchangeable Note, dated September 30,
 1997, made by Prime Group VI, L.P. and payable to Och-Ziff Capital Management,
 L.P. in the original principal amount of $20,000,000 (the "Note"), which
 provides for the exchange of principal of, and accrued interest on, the Note by
 exchange of shares of Common Stock of Brookdale Living Communities, Inc. ("BLCI
 Stock") on the terms specified in the Note.

          Pursuant to Section 3.2 of the Note, the undersigned hereby gives
notice of its intention to convert [not less than $100,000] principal amount,
                                    ----------------------
[including _________________ ($________) of interest compounded through the most
recent [compounding date], and _________________ ($ ________________) of accrued
interest thereon.

          The Exchange Price as determined pursuant to Section 3.3 of the Note
is $______ on the date hereof, and the number of shares of BLCI Stock to be
delivered pursuant to this Exchange Notice is ___________________.

          The Transfer Agent is hereby instructed to deliver the Exchange Shares
(as defined in the Note) to the undersigned at the address above, upon receipt
by the Transfer Agent of a share certificate for BLCI Stock, with appropriate
stock powers for reregistration.


                                        Very truly yours,   
                                                            
                                                            
                                                            
                                        for Och-Ziff Capital
                                        Management, L.P.     

cc: Robert J. Rudnik, Esq (The Prime Group, Inc.)



                                      B-1
<PAGE>
 
                                                                     Exhibit 7.1

                          FORM OF OPINION OF COUNSEL
                                TO THE COMPANY


                           [Matters To Be Covered In
                      Opinions of Counsel To the Company]
                      ---------------------------------- 

          1.   Each of the Company and BLCI is duly incorporated, validly
existing and in good standing, and the Company has requisite corporate power and
authority to issue and sell the Note, to exchange the Exchange Shares and to
execute and deliver the other Transaction Documents. The outstanding shares of
BLCI Stock shown on Schedule 3.4 as being owned by the Company have been validly
issued, are fully paid and nonassessable and are owned by the Company free and
clear of any liens or encumbrances of any nature, except as otherwise disclosed
in Schedule 3.4.

          2.   The Purchase Agreement, the Note and the other Transaction
Documents have been duly authorized by all necessary corporate action on the
part of the Company and BLCI, and each constitutes, on execution and delivery
thereof, a legal, valid and binding obligation of the Company or BLCI, as
applicable, enforceable against it in accordance with its terms, except as such
enforceability may be limited by (i) applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally and (ii) general principles of equity (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

          3.   The execution, delivery and performance by the Company of the
Purchase Agreement and the Note will not (i) contravene, result in any breach
of, or constitute a default under, or result in the creation of any lien in
respect of any property of the Company or BLCI under, any indenture, mortgage,
deed of trust, loan, purchase or credit agreement, lease, corporate charter or
by-laws, or any other Material agreement or instrument to which the Company or
BLCI is bound or by which the Company or BLCI or any of their respective
properties may be bound or affected, (ii) conflict with or result in a breach of
any of the terms, conditions or provisions of any order, judgment, decree, or
ruling of any court, arbitrator or governmental authority applicable to the
Company or BLCI or (iii) violate any provision of any statute or other rule or
regulation of any governmental authority applicable to the Company or BLCI.

          4.   No consent, approval or authorization of, or registration, filing
or declaration with, any governmental authority is required in connection with
the execution, delivery or performance by the Company of the Purchase Agreement
or the Note.

<PAGE>
 
          5.   There are no actions, suits or proceedings pending or, to the
best of such counsel's knowledge, threatened against or affecting the Company or
BLCI or any property of the Company or BLCI which could reasonably be expected
to affect the validity or enforceability of the Purchase Agreement, the Note and
the other Transaction Documents.

          6.   The offer and sale of the Note, and the exchange of the Exchange
Shares in exchange thereof, will not require registration under the Securities
Act of 1933, as amended, except that to the extent the Company would be
considered an "affiliate" of BLCI deliveries of the Exchange Shares would be
required to be made pursuant to an effective registration statement. Such
registration statement could be filed on Form S-3 within the time limits
specified therefor in the Registration Rights Agreement.

          7.   The sale and issuance of the Note will not result in a violation
of Regulations G, T or X of the Federal Reserve Board.

          8.   Neither the Company or BLCI is an "investment company", or a
company "controlled" by an "investment company", under the Investment Company
Act of 1940, as amended.

          9.   The Security Agreement creates a valid and perfected security
interest enforceable against the Company with respect to the Collateral, as
security for the payment of the Obligations (as defined therein).



<PAGE>

                                                                     EXHIBIT XII

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, 
OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED
OR OTHERWISE DISPOSED OF UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND 
APPLICABLE STATE SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN 
EXEMPTION FROM REGISTRATION UNDER SUCH ACT AND APPLICABLE STATE SECURITIES LAWS 
IS AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE, TRANSFER OR DISPOSITION. THIS 
NOTE IS ISSUED SUBJECT TO THE TERMS OF A NOTE PURCHASE AGREEMENT, DATED AS OF 
DECEMBER 5, 1997 BY AND BETWEEN PRIME GROUP VI, L.P., AND THE PURCHASER NAMED 
THEREIN.


                             PRIME GROUP VI, L.P.

                               EXCHANGEABLE NOTE

New York, New York                                                   $20,000,000
December 5, 1997

          FOR VALUE RECEIVED, PRIME GROUP VI, L.P., an Illinois limited 
partnership (the "Company"), HEREBY PROMISES TO PAY to the order of OCH-ZIFF 
CAPITAL MANAGEMENT, L.P., a Delaware limited partnership (the "Purchaser"), or 
its assigns, the sum of TWENTY MILLION DOLLARS ($20,000,000), in immediately 
available funds, on or before December 5, 2002 (the "Maturity Date"), and to pay
interest thereon from the date hereof (the "Issue Date"), as provided herein.


1.        DEFINITIONS.

          As used herein, in addition to the capitalized terms defined above, 
capitalized terms not otherwise defined shall have the following meanings:

          (a)  "Applicable Percentage" has the meaning ascribed thereto in 
Section 3.3.

          (b)  "BLCI" means Brookdale Living Communities, Inc., a Delaware 
corporation.

          (c)  "BLCI Stock" means the Common Stock, par value $0.01 per share, 
of BLCI.

          (d)  "Closing Bid Price" means, with respect to a security, the 
closing bid price of such security on the principal securities exchange or 
trading market where such security is listed or traded as reported (i) if the 
NASDAQ National Market is the principal market on which




<PAGE>
 
the BLCI Stock is then traded, by NASDAQ, (ii) if the New York Stock Exchange or
American Stock Exchange is the principal market on which the BLCI Stock is then 
traded, by such respective exchange, (iii) if none of the NASDAQ National Market
or such exchanges is the principal market, by Bloomberg Financial Markets, (iv) 
if Bloomberg Financial Markets is not then reporting closing bid prices of such 
security, a comparable reporting service of national reputation selected by the 
Company and reasonably acceptable to the Holder, (v) if the foregoing does not 
apply, the last reported sale price of such security in the over-the-counter 
market on the electronic bulletin board for such security as reported by such 
reporting service, (vi) if no sale price is reported for such security, the 
average of the bid prices of all market makers for such security as reported in 
the "pink sheets" by the National Quotation Bureau, Inc., or (vii) with respect 
to any security that does not constitute a security of the type specified in the
foregoing clauses, or otherwise for which no closing price is published, the 
value of such security determined by the valuation method agreed upon in writing
by the Holder and the Company for such security prior to such date. If the 
Closing Bid Price cannot be calculated for such security on such date on any of
the foregoing bases, the Closing Bid Price of such security on such date shall 
be the fair market value as reasonably determined by an investment banking firm 
selected by the Holder and acceptable to the Company with the reasonable costs 
of such appraisal to be borne by the Company.

          (e)  "Collateral" has the meaning ascribed thereto in the Security 
Agreement.

          (f)  "Default Rate" has the meaning ascribed thereto in Section 2.2.

          (g)  "Delivery Date" has the meaning ascribed thereto in Section 3.4.

          (h)  "Exchange" has the meaning ascribed thereto in Section 3.1.

          (i)  "Exchange Conditions" has the meaning ascribed thereto in
Section 3.4.

          (j)  "Exchange Date" has the meaning ascribed thereto in Section 3.2.

          (k)  "Exchange Default" has the meaning ascribed thereto in Section
3.5.

          (l)  "Exchange Notice" has the meaning ascribed thereto in Section
3.2.

          (m)  "Exchange Price" has the meaning ascribed thereto in Section
3.3.

          (n)  "Exchange Shares" has the meaning ascribed thereto in Section
3.1.

          (o)  "Floor Exchange Price" has the meaning ascribed thereto in
Section 3.3.

          (p)  "Holder" means the holder of this Note and its permitted assigns.

          (q)  "Initial Exchange Date" has the meaning ascribed thereto in
Section 3.1.

                                      2

<PAGE>
 
          (r)  "Mandatory Redemption" has the meaning ascribed thereto in 
Section 5.1.

          (s)  "Mandatory Redemption Date" has the meaning ascribed thereto in 
Section 5.1.

          (t)  "Mandatory Redemption Event" has the meaning ascribed thereto in 
Section 5.4.

          (u)  "Mandatory Redemption Price" has the meaning ascribed thereto in 
Section 5.2.

          (v)  "Optional Redemption" has the meaning ascribed thereto in 
Section 4.1.

          (w)  "Optional Redemption Date" has the meaning ascribed thereto in 
Section 4.1.
          
          (x)  "Optional Redemption Price" has the meaning ascribed thereto in 
Section 4.2.

          (y)  "Purchase Agreement" means the Note Purchase Agreement, dated the
date hereof, by and between the Company and the Purchaser.

          (z)  "Registration Rights Agreement" means the Registration Rights 
Agreement, dated as of May 7, 1997, among BLCI, The Prime Group, Inc., Prime 
Group Limited Partnership and the Company, as amended by Amendment No. 1, dated 
as of the date hereof (the "Registration Rights Agreement Amendment").

          (aa) "Registration Statement" means a registration statement or 
statements in compliance with the Securities Act of 1933, as amended, and 
pursuant to Rule 415 under the Securities Act or any successor rule providing 
for the offering of securities on a continuous basis, covering the resale of the
Exchange Shares exchangeable hereunder, filed in accordance with the 
Registration Rights Agreement.

          (ab) "Security Agreement" means the Pledge and Security Agreement, 
dated the date hereof, by and between the Company and the Purchaser.

          (ac) "Standstill Period" has the meaning ascribed thereto in the 
Purchase Agreement.

          (ad) "Trading Day" means any day on which the BLCI Stock is traded for
any period on the NASDAQ National Market System or on the principal securities 
exchange or market on which the BLCI Stock is then traded.

          (ae) "Transfer Agent" means the transfer agent for BLCI Stock at any 
time.

                                       3

<PAGE>
 
          (af) "Value" has the meaning ascribed thereto in the Purchase 
Agreement.

          The following non-capitalized terms shall have the respective 
following meanings: (i) an "affiliate" of a party shall mean any person or 
entity controlling, controlled by or under common control with that party; and 
(ii) a "business day" means any day other than a Saturday, Sunday or other day 
on which the New York Stock Exchange and commercial banks in the cities of 
Chicago and New York are authorized to close for business.


2.        INTEREST.

          2.1  Interest Rate. (a) This Note shall bear interest on the unpaid 
               -------------
principal amount hereof, from the date hereof until such principal shall be paid
in full, at a rate of four percent (4%) per annum, computed on the basis of a 
360-day year of twelve 30-day months, for the actual number of days elapsed. 
Subject to Section 2.1(b), interest accrued hereunder shall be due and payable 
quarterly in arrears commencing on December 31, 1997 and, thereafter, on the 
last day of March, June, September and December, on an Optional Redemption Date,
on a Mandatory Redemption Date and on the Maturity Date, until the principal 
hereof shall have been paid or redeemed in full. If any payment becomes due and 
payable on a day other than a business day, the maturity thereof shall be 
automatically extended to the next business day.

          (b)  Any regular quarterly interest payable under Section 2.1(a) above
may, pursuant to election by the Company in its sole discretion, not be paid in 
cash on the payable date therefor, in which event the unpaid interest shall be 
compounded and added to the principal amount hereof on such date, and regular 
interest on the principal amount of this Note, as so compounded, shall continue 
to accrue thereafter in accordance with Section 2.1(a).

          2.2  Default Rate. This Note shall bear interest, to the extent 
               ------------
permitted by law, on any overdue payment of principal, payment of interest 
(other than compoundings of interest under Section 2.1(b)), or other amount 
payable hereunder, payable quarterly on each regular interest payable date, or 
at the option of the Holder, on demand, at a rate per annum (the "Default Rate")
from time to time equal to the greater of (i) fourteen percent (14%) or (ii) two
percent (2%) over the "prime" rate (as published in the Wall Street Journal) on 
the relevant date of determination, but in any case not higher than the highest 
rate permitted by applicable law, from the date of default until payment in 
full.


3.        EXCHANGE.

          3.1  Right to Exchange. (a) Subject to the limitation contained in 
               -----------------
Section 3.6 below, the Holder shall have the right to exchange the outstanding 
unpaid principal of, and accrued interest on, this Note from time to time, as 
specified herein, on and after November 15, 1998 (the "Initial Exchange Date") 
into fully paid and non-assessable shares of BLCI Stock ("Exchange Shares"), 
free and clear of any liens, claims, encumbrances or restrictions on

                                       4
<PAGE>
 
transfer (other than with respect to applicable state and federal securities 
laws) on transfer, in accordance with the terms hereof (an "Exchange").

          (b)  On and following the Initial Exchange Date, the Holder shall be 
entitled to exchange up to twenty-five percent (25%) of the original principal
amount hereof, together with compoundings of interest pursuant to Section 2.1(b)
and accrued but unpaid interest on such aggregate principal amount. Thereafter,
the Holder shall be entitled to exchange up to a further twenty-five percent
(25%) of the original principal amount hereof, together with compoundings of
interest pursuant to Section 2.1(b) and accrued but unpaid interest thereon, on
each second-month anniversary of the Initial Exchange Date until May 15, 1999.
Subject to the limitation in Section 3.6, the Holder shall be entitled to
cumulate the amount of the principal outstanding under this Note, and accrued
but unpaid interest thereon, which the Holder becomes entitled to exchange, but
does not exchange, pursuant to this Section 3.1(b).

          3.2  Exchange Notice. (a) In order to exchange any portion of the 
               ---------------
principal of, and accrued interest on, this Note, the Holder shall send by 
facsimile transmission, at any time prior to 8 p.m., New York time, on the date 
on which the Holder wishes to effect such Exchange (the "Exchange Date"), a 
notice of exchange in the form of Exhibit B hereto (an "Exchange Notice") to the
Company and to the Transfer Agent, stating (i) the principal amount of the Note 
to be exchanged, including compoundings of interest pursuant to Section 2.1(b), 
which amount shall not be less than $100,000 (or such lesser amount remaining 
unpaid on the final Exchange Date), (ii) the amount of interest accrued on the 
then unpaid principal balance of the Note, up to and including the Exchange 
Date, (iii) the applicable Exchange Price, and (iv) a calculation of the number 
of shares of BLCI Stock to be delivered on such Exchange. The Holder shall not 
be required physically to surrender this Note to the Company or to the Transfer 
Agent in order to effect an Exchange; provided, however, that the amounts 
outstanding under this Note shall automatically be reduced by the amounts of any
such portion of the principal and accrued interest exchanged for Exchange Shares
pursuant to this Section 3.

          (b)  The Company shall maintain a record showing, at any given time, 
the unpaid principal amount of this Note, the accrued but unpaid interest 
thereon, and the date of each Exchange or other payment of principal hereof. The
Holder shall amend Exhibit A hereto on any such Exchange or payment of principal
to reflect the unpaid principal amount hereof; provided, that the failure to do 
so shall not affect the Company's obligations hereunder.

          3.3  Number of Exchange Shares; Exchange Price. The number of Exchange
               -----------------------------------------
Shares exchangeable by the Holder pursuant to an Exchange shall be equal to (x) 
the aggregate amount of principal of this Note specified for exchange in the 
Exchange Notice, together with accrued but unpaid interest thereon, divided (y) 
by the Exchange Price in effect on the Exchange Date. The "Exchange Price" as of
an Exchange Date shall be the product of (m) the Applicable Percentage times (n)
the average of the Closing Bid Prices for BLCI Stock on the seven (7) Trading 
Days occurring immediately prior to (but not including) such Exchange Date; 
provided, that if the Exchange Price as so determined is less than $17.60 (as 
adjusted for stock splits, stock dividends, etc., the "Floor Exchange Price"), 
the Company shall be entitled to effect an 

                                       5
<PAGE>
 
Optional Redemption pursuant to Section 4.1. The "Applicable Percentage" for 
purposes of calculation of the Exchange Price shall mean eighty-eight percent 
(88%).

          3.4  Delivery of Exchange Shares. (a) Provided that the Company does 
               ---------------------------
not make written objection to an Exchange Notice by 8:00 p.m., New York time, on
the business day following the delivery thereof, and provided that the Exchange 
Conditions are satisfied at such time, the Holder shall send for re-registration
to the Transfer Agent on or following the Exchange Date set forth in such 
Exchange Notice (the "Delivery Date") certificate(s) for BLCI Stock sufficient 
to permit the issuance to the Purchaser or its nominee of the number of Exchange
Shares specified in the Exchange Notice. The "Exchange Conditions" to be met on 
each Delivery Date are as follows: (i) the Company shall not have given notice 
to the Holder that the Registration Statement is not effective and available for
resales of the Exchange Shares at such time; (ii) the BLCI Stock is then 
designated for quotation on the NASDAQ National Market System or listed on the 
New York Stock Exchange or the American Stock Exchange; and (iii) the Holder 
holds Collateral, after delivery of the Exchange Shares identified by the 
Exchange Notice, with a Value greater than the Minimum Required Amount (as 
defined in the Security Agreement).

          (b) If any Exchange would create a fractional Exchange Share, such 
fractional Exchange Share shall be disregarded and the number of Exchange Shares
to be delivered on such Exchange, in the aggregate, shall be the next higher 
number of Exchange Shares; provided, that in any such case of fractional 
Exchange Share adjustment, the principal outstanding under this Note shall be 
further automatically reduced, at the Exchange Price, to reflect delivery of the
balance of the fractional Exchange Share.

          (c) In the case of a dispute as to the calculation of the Exchange 
Price or the number of Exchange Shares to be delivered on an Exchange, the 
Transfer Agent shall re-register into the name of the Purchaser or its nominee 
the number of Exchange Shares that are not disputed, and the Company shall 
submit the disputed calculations to Ernst & Young, 787 Seventh Avenue, New York,
New York 10019, Attn: Larry Statsky, within two (2) business days of receipt of 
the Holder's Exchange Notice. Such accountants shall calculate the Exchange 
Price as provided herein, and notify the Company and the Holder of the results 
in writing no later than two (2) business days following the day on which the 
Company received the disputed calculations. Such accountants' calculation shall 
be deemed conclusive in the absence of manifest error. The fees of any such 
accountants shall be borne by the Company, unless such accountants' calculation 
agrees with the calculation(s) asserted by the Company in such dispute to be 
true, in which case such fees shall be borne by the Purchaser.

          3.5  Failure to Deliver Exchange Shares. The failure of the Holder to 
               ----------------------------------
deliver certificates for re-registration due to failure of an Exchange 
Condition, or the failure of the Transfer Agent to deliver to the Holder the 
number of Exchange Shares specified in the applicable Exchange Notice within 
three (3) business days of the Delivery Date therefor shall constitute an 
"Exchange Default".

                                       6
<PAGE>
 
          3.6  Limitation on Right to Exchange. In no event shall the Holder be 
               ------------------------------- 
permitted to exchange the outstanding principal of this Note, or accrued but 
unpaid interest thereon, in excess of an amount which, on Exchange for shares of
BLCI Stock, and aggregation with other shares of BLCI Stock then beneficially 
owned by the Holder (other than shares which deemed beneficially owned but for 
the limitation of this Section 3.6), would equal or exceed 5.0% of the total 
number of shares of BLCI Stock then issued and outstanding. The determination of
whether the limitation of this Section 3.6 applies, and whether principal of, 
and accrued interest on, this Note is exchangeable (in relation to other 
securities owned by the Holder) shall be in the reasonable discretion of the 
Holder, and the submission of an Exchange Notice shall be deemed to constitute 
the Holder's determination that such limitation does not apply. In the event 
that the limitation contained in this Section 3.6 applies to all or a portion of
the unpaid principal amount of this Note, nothing contained herein shall be 
deemed to restrict the right of the Holder to exchange such principal amount at 
any later time when such Exchange will no longer violate such limitation.

          3.7  Required Exchange. If any principal amount of the Note remains 
               ----------------- 
outstanding and unpaid on the third anniversary of the Issue Date, the Company 
may require the Exchange thereof (but only if the Registration Statement is then
effective covering all Exchange Shares receivable in such Exchange), together 
with accrued but unpaid interest thereon, into shares of BLCI Stock by delivery 
of a notice to such effect to the Holder, substantially in the form of Exhibit B
hereto with appropriate modifications to indicate that the Company is exercising
its rights to require Exchange of the Note pursuant to this Section 3.7. The 
Exchange Price for Exchange Shares in such a required Exchange shall be 
determined in accordance with Section 3.3, without provision for an Optional 
Redemption in case the Closing Bid Price falls below the Floor Exchange Price.


4.        OPTIONAL REDEMPTION BY THE COMPANY.

          4.1  Optional Redemption. The Company shall have the right, in its 
               ------------------- 
sole discretion, to redeem (an "Optional Redemption") all or a portion of the 
aggregate amount of principal of this Note, together with accrued but unpaid 
interest thereon, as follows:

               (i) If on the date of delivery of any Exchange Notice the
          Exchange Price for BLCI Stock is less than the Floor Exchange Price,
          the Company shall have the right to effect an Optional Redemption of
          the principal amount, and accrued interest thereon, sought to be
          exchanged by the Holder as of such Exchange Date, at the Optional
          Redemption Price therefor on the date ten (10) days after the proposed
          Exchange Date, or first business day thereafter (an "Optional
          Redemption Date" with respect to an Exchange Date). The Company must
          exercise its right to effect such Optional Redemption by written
          notice thereof given to the Holder, on or before 8:00 p.m., New York
          time, on the next business day following the date of delivery of such
          Exchange Notice. Notice of

                                       7
<PAGE>
 
          such Optional Redemption, once given, shall obligate the Company to 
          make the Optional Redemption specified therein.

               (ii) If a Standstill Period continues for more than ninety (90)
          days, the Company shall have the right to effect an Optional
          Redemption of the unpaid principal amount of this Note at the Optional
          Redemption Price therefor on the date ten (10) days after the delivery
          of written notice to such effect, or first business day thereafter (an
          "Optional Redemption Date" with respect to a Standstill Period);
          provided, that the Purchaser shall be entitled to receive as Exchange
          Shares, calculated at the Exchange Price therefor, as Purchaser may be
          eligible to purchase on such date, with a pro tanto reduction in the
          Optional Redemption Price payable on such date. The Company must
          exercise its right to effect such Optional Redemption by written
          notice thereof given to the Holder, on or before 8:00 p.m., New York
          time, within ten (10) business days following the termination of such
          90 day period. Notice of such Optional Redemption, once given, shall
          obligate the Company to make the Optional Redemption specified 
          therein.

          4.2 Optional Redemption Price. (a) The "Optional Redemption Price" 
              -------------------------
payable with respect to any Optional Redemption shall be (x)(i) in the case of 
an Exchange Date Optional Redemption, the portion of the original principal 
amount of this Note sought to be exchanged in such Exchange Notice (i.e., 
excluding compoundings of interest pursuant to Section 2.1(b)), or (ii) in the 
case of a Standstill Period Optional Redemption, the unpaid principal amount of 
this Note, as reduced to permit the Exchange of Shares provided by Section 
4.1(ii), multiplied by (y) fourteen percent (14%) per year, in either case from 
and including the Issue Date to but excluding the date of payment of the 
Optional Redemption Price, compounded annually, for the actual number of days 
elapsed. 

          (b) The Company shall pay the Optional Redemption Price to the Holder,
in immediately available funds, on the Optional Redemption Date for such
Optional Redemption. If the Company fails to pay the Optional Redemption Price
to the Holder on the Optional Redemption Date, then the Holder shall be entitled
to interest on the unpaid portion of such redemption payment at the Default Rate
from the Optional Redemption Date until the Optional Redemption Price and all
accrued interest thereon is paid in full. In the event the Company redeems the
entire remaining unpaid principal amount of this Note, together with all
interest accrued thereon and all other amounts due in connection therewith, the
Holder shall return this Note to the Company for cancellation.

5. MANDATORY REDEMPTION BY THE COMPANY.

          5.1 Mandatory Redemption. In the event that a Mandatory Redemption 
              --------------------  
Event occurs, the Holder shall have the right, on written notice to the Company,
to have all or any portion of the unpaid principal amount of this Note redeemed 
by the Company (a "Mandatory

                                       8
<PAGE>
 

Redemption") at the Mandatory Redemption Price, in immediately available funds.
Such notice shall specify the effective date of such Mandatory Redemption, which
shall be a business day, not less than ten (10) days following the date such
notice is given (the "Mandatory Redemption Date"), and the amount of principal
to be redeemed.

          5.2  Mandatory Redemption Price. The "Mandatory Redemption Price"
               -------------------------- 
shall be (x) the original principal amount of this Note (i.e., excluding
compoundings of interest pursuant to Section 2.1(b)) then remaining unpaid and
outstanding (unless a lesser amount is specified) multiplied by (y) fourteen
percent (14%) per year, compounded annually, from and including the Issue Date
to but excluding the date of payment of the Mandatory Redemption Price, without
deduction or offset of any kind.

          5.3  Payment of Mandatory Redemption Price. The Company shall pay the
               ------------------------------------- 
Mandatory Redemption Price to the Holder on the Mandatory Redemption Date. In
the event that the Company redeems the entire remaining unpaid principal amount
of this Note, and pays to the Holder all interest accrued thereon and all other
amounts due in connection therewith, the Holder shall return this Note to the
Company for cancellation. If Company fails to pay the Mandatory Redemption Price
to the Holder on the Mandatory Redemption Date, the Holder shall be entitled to
interest on the unpaid portion at the Default Rate from such date until the
Mandatory Redemption Price, and all accrued interest thereon, is paid in full.

          5.4  Mandatory Redemption Event. Each of the following events shall be
               -------------------------- 
deemed a "Mandatory Redemption Event":

          (a)  an Exchange Default occurs and continues for five (5) business 
days, during which time the Company has not elected to make an Optional 
Redemption of the principal amount and accrued interest subject to the Exchange 
Notice;

          (b)  the Company fails to pay an Optional Redemption Price within five
(5) business days of the date required;

          (c)  the Company fails to deposit with the Holder any additional 
shares of BLCI Stock or other Collateral required pursuant to the Purchase
Agreement or the Security Agreement, within five (5) business days of the date
required.

          (d)  the Company breaches, in a material respect, any covenant or 
other material term or condition of this Note, the Purchase Agreement, the 
Security Agreement, or any other agreement, certificate or instrument delivered 
by the Company in connection therewith, other than as elsewhere specified in 
this Section 5.4, and such breach continues for a period of ten (10) business 
days after the earlier of (i) an executive officer of the Company obtaining 
actual knowledge of such default, and (ii) the Company receiving written notice 
of such default from the Holder;

                                       9
<PAGE>
 

          (e)  the Registration Statement is not declared effective on or prior
to the Registration Deadline (as defined in the Purchase Agreement) or if the
Registration Statement has been declared effective by such date, and the
effectiveness of the Registration Statement lapses for any reason (including
without limitation, the issuance of a stop order) or is unavailable to cover the
resale of Exchange Shares in accordance with the terms of the Registration
Rights Agreement, and such lapse or unavailability continues for a period of
five (5) business days; provided, that the cause of such lapse or unavailability
is not due to factors solely within the control of the Holder; and provided,
further, that the Registration Statement shall not be deemed to have lapsed or
to be unavailable, for purposes of this Section 5.4 only, during any Standstill
Period (as defined in the Purchase Agreement with a duration of less than thirty
(30) days);

          (f)  any representation or warranty made in writing by or on behalf of
the Company or by any officer of the Company furnished in connection with the 
transactions contemplated hereby proves to have been false or incorrect in any 
material respect on the date as of which made;

          (g)  (i) the Company is in default (as principal or as guarantor or 
other surety) in the payment of any principal of or interest on any indebtedness
that is outstanding in an aggregate principal amount of at least $1,000,000 
beyond any period of grace provided with respect thereto, or (ii) the Company is
in default in the performance of or compliance with any term of any evidence of 
any indebtedness in an aggregate outstanding principal amount of at least 
$1,000,000 or of any mortgage, indenture or other agreement relating thereto, or
any other condition exists, and as a consequence of such default or condition 
such indebtedness has become, or has been declared due and payable before its 
stated maturity or before its regularly scheduled dates of payment; or

          (h)  (i) BLCI Stock is delisted at any time from trading on the NASDAQ
National Market System, the New York Stock Exchange or the American Stock 
Exchange, or (ii) Closing Bid Prices for BLCI Stock are unavailable for five 
consecutive Trading Days on the NASDAQ National Market System or either such 
exchange; or

          (i)  the sale, conveyance or disposition of all or substantially all 
of the assets of the Company, the effectuation of a transaction or series of 
transactions, in which more than fifty percent (50%) of the voting power of the 
Company is disposed of, or the consolidation, merger or other business 
combination of the Company with or into any other entity, immediately following 
which the prior stockholders of the Company fail to own, directly or indirectly,
at least fifty percent (50%) of the surviving entity; or

          (j)  the Company (i) is generally not paying, or admits in writing its
inability to pay, its debts as they become due, (ii) files, or consents by
answer or otherwise to the filing against it of, a petition for relief or
reorganization or arrangement or any other petition in bankruptcy, for
liquidation or to take advantage of any bankruptcy, insolvency, reorganization,
moratorium or other similar law of any jurisdiction, (iii) makes an assignment
for the benefit of its creditors, (iv) consents to the appointment of a
custodian, receiver, trustee or other officer

                                      10
<PAGE>
 
with similar powers with respect to it or with respect to any substantial part
of its property, (v) is adjudicated as insolvent or to be liquidated, or (vi)
takes corporate action for the purpose of any of the foregoing; or
 
          (k) a court or governmental authority of competent jurisdiction enters
an order appointing, without consent by the Company, a custodian, receiver,
trustee or other officer with similar powers with respect to it or with respect
to any substantial part of its property, or constituting an order for relief or
approving a petition for relief or reorganization or any other petition in
bankruptcy or for liquidation or to take advantage of any bankruptcy or
insolvency law of any jurisdiction, or ordering the dissolution, winding-up or
liquidation of the Company or any such petition shall be filed against the
Company and such petition shall not be dismissed within 60 days; or
 
          (l) a final judgment or judgments for the payment of money aggregating
in excess of $1,000,000 are rendered against the Company which judgment is not,
within 60 days after entry thereof, bonded, discharged or stayed pending appeal,
or are not discharged within 60 days after the expiration of such stay.
 
          5.5  Failure to Pay Redemption Amounts. If the Company fails to pay
               --------------------------------- 
the Mandatory Redemption Price on the Mandatory Redemption Date, then the Holder
shall have the right (but not the obligation) at any time, so long as the
Company remains in default, to require the Transfer Agent, on written notice,
promptly to register in the name of the Holder (or its designee), and deliver to
the Holder, the number of shares of BLCI Stock equal to (x) the outstanding
principal amount of this Note subject to Mandatory Redemption, together with
compoundings of interest at the rate and as provided pursuant to Section 2.1(b),
divided by (y) (i) eighty-three percent (83%) times (ii) the average of the
Closing Bid Prices for BLCI Stock on the seven (7) Trading Days occurring
immediately prior to (but not including) the Mandatory Redemption Date;
provided, that if the Registration Statement is not in effect on the date of
such notice, or ceases to be in effect at any time during the thirty (30) day
period thereafter, the Holder may require the Transfer Agent, on written notice,
promptly to register in the name of the Holder (or its designee), and deliver to
the Holder, such additional number of shares of BLCI Stock as shall be required
to permit the aggregate number of shares delivered to the Holder under this
Section 5.5 to equal (x) the outstanding principal amount of this Note subject
to Mandatory Redemption, together with compoundings of interest at the rate and
as provided pursuant to Section 2.1(b), divided by (y) (i) seventy percent (70%)
times (ii) the average of the Closing Bid Prices for BLCI Stock on the seven (7)
Trading Days occurring immediately prior to (but not including) the Mandatory
Redemption Date. Upon the expiry of such 30 day period, the delivery of the
shares of BLCI Stock required pursuant to this Section 5.5 shall discharge the
Company's obligation to pay the Mandatory Redemption Price otherwise due on the
Mandatory Redemption Date.
 
                                      11
<PAGE>
 
6.        MISCELLANEOUS.
 
          6.1  Lost or Stolen Note. On receipt by the Company of evidence of the
               ------------------- 
loss, theft, destruction or mutilation of this Note, and (in the case of loss,
theft or destruction) of indemnity or security reasonably satisfactory to the
Company, and on surrender and cancellation of the Note, if mutilated, the
Company shall execute and deliver to the Holder a new note identical in all
respects to this Note. On the issuance of any new Note hereunder, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge and any expenses (including reasonable fees and expenses of
counsel) in connection therewith.

          6.2  Notices. Any notice, demand or request required or permitted to
               -------
be given by the Company or the Holder pursuant to the terms of this Note shall
be in writing and shall be deemed given when delivered personally or by
verifiable facsimile transmission (with a hard copy to follow by nationally
recognized air courier) or on the next business day after timely delivery to a
nationally recognized overnight courier, guarantying next day delivery, delivery
charges prepaid, or sent by registered or certified mail, return receipt
requested, postage prepaid, to the following addresses:

          If to the Company:
 
          Prime Group VI, L.P.
          c/o The Prime Group, Inc.
          77 West Wacker Drive, Suite 3900
          Chicago, Illinois 60601
          Attn: Michael W. Reschke

          Tel: 312-917-4201
          Fax: 312-917-1511
 
          with a copy to:
 
          The Prime Group, Inc.
          77 West Wacker Drive, Suite 3900
          Chicago, Illinois 60601
          Attn: Robert J. Rudnik, Esq.
 
          Tel: 312-917-4234
          Fax: 312-917-1684
 
          with a copy to:
 
          Winston & Strawn
 
                                      12
<PAGE>
 
          35 West Wacker Drive
          Chicago, Illinois 60601
          Attn: Wayne D. Boberg, Esq. 
 
          Tel: 312-558-5600
          Fax: 312-558-5700
 
          If to the Holder:
 
          Och-Ziff Capital Management, L.P.
          153 East 53rd Street, 43rd Floor
          New York, New York 10022
          Attn: Joel Frank, Chief Financial Officer
 
          Tel: 212-292-5956
          Fax: 212-292-5950
 
or at such other address or facsimile number as the Holder shall have furnished
to the Company in accordance with this Section 6.2.
 
          6.3  Successors and Assigns. Holder may assign its rights hereunder,
               ---------------------- 
in connection with any private sale or transfer of the Note, so long as, as a
condition precedent to such transfer, the transferee executes an acknowledgment
agreeing to be bound by the applicable provisions of this Note, in which case
the term "Holder" shall be deemed to refer to such transferee; provided, that
the Company's consent shall in any case not be required (but the Company shall
nonetheless be entitled to receive written notice thereof) in the event of a
sale, transfer or disposition of this Note to an affiliate of the Holder. From
and after the date of such sale, transfer or disposition, the transferee hereof
shall be deemed to be the Holder. On any such sale, transfer or disposition, the
Company shall, promptly following the return of this Note by the transferee
hereof, issue and deliver to such transferee a new Note identical in all
respects to this Note, in the name of such transferee, except that the principal
amount of such new Note may reflect the unpaid principal amount of this Note at
the time of such sale, transfer or disposition.
 
          6.4  Injunctive Relief. The Company acknowledges that a breach by it
               ----------------- 
of its obligations hereunder may cause irreparable harm to the Holder and that
the remedy or remedies at law for any such breach may be inadequate and agrees,
in the event of any such breach, in addition to all other available remedies,
the Holder shall have the right to obtain equitable relief to enforce this Note.

          6.5  Failure to Exercise Rights Not Waiver. No failure or delay on the
               ------------------------------------- 
part of the Holder in the exercise of any power, right or privilege hereunder
shall operate as a waiver thereof, nor shall any single or partial exercise of
any such power, right or privilege preclude

                                      13
<PAGE>
 
any other or further exercise thereof. All rights and remedies of the Holder
hereunder are cumulative and not exclusive of any rights or remedies otherwise
available.

          6.6 Amendments. Except as expressly provided herein, neither this Note
              ----------  
nor any term hereof may be amended except pursuant to a written instrument
executed by the Company and the Holder, and no provision hereof may be waived
other than by a written instrument signed by the party against whom enforcement
of any such waiver is sought.

           6.7 Governing Law; Consent to Jurisdiction. (a) This Note shall be
               -------------------------------------- 
governed by and construed in accordance with the substantive laws of the State
of New York, without giving effect to the choice of law provisions thereof,
except to the extent that the validity or perfection of the security interest
hereunder, or remedies hereunder, in respect of any particular Collateral are
governed by the laws of a jurisdiction other than the State of New York.

           (b) The Company hereby irrevocably agrees that, subject to Holder's
sole and absolute election, all actions or proceedings which in any manner arise
out of or in connection with or are in any way related to this Note or other
related agreements shall be litigated in courts having situs within the County
of New York, State of New York, and the Company hereby consents to the
jurisdiction of any state or federal court located with the County of New York,
State of New York. The Company hereby waives any right it may have to transfer
or change the venue of any litigation between grantor and purchaser in
accordance with this paragraph.

          6.8 Waiver of Jury Trial. THE COMPANY HEREBY KNOWINGLY, VOLUNTARILY
              --------------------  
AND INTENTIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY in any action or proceeding
which in any manner arises out of or in connection with or is in any way related
to this Note or any of the transactions contemplated herein.

          IN WITNESS WHEREOF, the Company has caused this Note to be executed in
its name by its duly authorized officer on the date first above written.

                                       PRIME GROUP VI, L.P.
                                       By: PGLP, Inc.
                                           its Managing General Partner

                                       By: /s/ JEFFREY A. PATTERSON
                                           ------------------------------------
                                       Name:  JEFFREY A. PATTERSON
                                             ----------------------------------
                                       Title: Vice President
                                              ---------------------------------

                                      14

<PAGE>
 
                                                                       Exhibit A

                             Schedule of Principal
                 Payments, Interest Compoundings and Exchanges

<TABLE> 
<CAPTION> 
               Amount Paid,      
Principal      Compounded Interest    Date of Payment, Compounding
Balance        or Amount Exchanged    or Exchange                 
<S>            <C>                    <C>                         
$20,000,000    -------------------    -------------------          
</TABLE> 

                                      A-1

<PAGE>
                                                                    EXHIBIT XIII

 
                         PLEDGE AND SECURITY AGREEMENT

     This PLEDGE AND SECURITY AGREEMENT (this "Agreement"), dated as of December
5, 1997, between PRIME GROUP VI, L.P., an Illinois limited partnership
("Pledgor"), and OCH-ZIFF CAPITAL MANAGEMENT, L.P., a Delaware limited
partnership ("Secured Party").

     WHEREAS: Pursuant to a Note Purchase Agreement, dated as of the date hereof
(as amended from time to time, the "Purchase Agreement"), between Pledgor and
Secured Party, Secured Party has agreed to purchase a promissory note (the
"Note") from Pledgor in the form of Exhibit A to the Purchase Agreement, on the
terms and subject to the conditions set forth in the Purchase Agreement;

     WHEREAS: Secured Party's obligation to purchase the Note is subject, among
other conditions, to its receipt of this Agreement, duly executed by Pledgor.

     NOW, THEREFORE, in consideration of the foregoing and other good and
valuable consideration, Pledgor hereby agrees with Secured Party as follows:

1.   DEFINITIONS.

     As used herein, in addition to capitalized terms defined in the recitals
above and in the Note, the following capitalized terms have the following
meanings:

     (a) "Cash Equivalents" shall mean: (i) marketable direct obligations issued
or unconditionally guaranteed by the United States Government or issued by an
agency thereof and backed by the full faith and credit of the United States, in
each case maturing within ninety (90) days after the date of acquisition
thereof; and (ii) commercial paper maturing no more than ninety (90) days after
the date of acquisition thereof and, at the time of acquisition, having a rating
of at least A-1 or P-1 from either Standard & Poor's Corporation or Moody's
Investors Service, Inc. (or, if at any time neither Standard & Poor's
Corporation nor Moody's Investors Service, Inc. shall be rating such
obligations, then the highest rating from such other nationally recognized
rating services acceptable to the Bank).

     (b) "Collateral" has the meaning ascribed thereto in Section 2.1.

     (c) "Equity Security" means, as of any date, a security that meets each of
the following criteria: (A) such security is traded on the New York Stock
Exchange or the American Stock Exchange, or is quoted on the NASDAQ NMS, on such
date, (B) such security has a current Value in excess of $5.00 on such date, (C)
such security has not been, and no other securities of the same issuer have
been, suspended from trading in the year prior to such date

<PAGE>
 
by a regulatory agency, and (D) no restrictions or control issues of any kind
limit the salability of such security; provided, that Secured Party may, upon
ten (10) business days' notice to Pledgor inform Pledgor that any such security
shall, as of the first business day following such 10-day period, no longer be
eligible as Collateral.

     (d) "Initial Pledged Shares" has the meaning ascribed thereto in Section 
2.1(i).

     (e) "Investment Grade Securities" means U.S. Dollar debt securities of
corporate issuers domiciled in the United States and having a long-term debt
rating of at least A (or its equivalent) from Standard and Poor's Corporation or
Moody's Investors Service, Inc., and not listed in Credit Watch published by
Standard & Poor's Corporation.

     (f) "Minimum Required Amount" means one hundred and twenty-five percent 
(125%) of the outstanding and unpaid principal amount of the Note at any time.

     (g) "Maximum Required Amount" means one hundred and fifty percent (150%) 
of the outstanding and unpaid principal amount of the Note at any time.

     (h) "Obligations" has the meaning ascribed thereto in Section 2.1.

     (i) "Pledged Shares" has the meaning ascribed thereto in Section 2.1(ii).

     (j) "Securities Act" means the Securities Act of 1933, as amended.

     (k) "Target Amount" means one hundred and twenty-five percent (125%) of the
outstanding and unpaid principal amount of the Note at any time.

     (l) "Value" has the meaning ascribed thereto in the Purchase Agreement.

     Terms defined in Articles 8 and 9 of the Uniform Commercial Code in the 
State of New York are used herein as therein defined.

2.   GRANT OF SECURITY INTEREST.

     2.1  Pledge and Grant of Security Interest.  For value received, and to
induce Secured Party to enter into the Purchase Agreement, Pledgor hereby
pledges and grants to Secured Party, as security for all present and future
obligations and liabilities of Pledgor to Secured Party, whether due or to
become due, secured or unsecured, absolute or contingent, arising under the
Purchase Agreement or other Transaction Documents (as defined in the Purchase
Agreement) (collectively, the "Obligations"), a continuing security interest in
all of Pledgor's right, title and interest in the following, whether now
existing or from time to time hereafter acquired (collectively, the
"Collateral"):

                                       2
<PAGE>
 
     (i) 1,370,000 shares of BLCI Stock; (the "Initial Pledged Shares"), and the
certificates representing the same;

     (ii) such additional shares of BLCI Stock, Cash, Cash Equivalents or
Investment Grade Securities that may be delivered to Secured Party hereunder
from time to time as collateral for the Obligations (collectively with the
Initial Pledged Shares, the "Pledged Shares"), and certificates or instruments
representing the same, all of which Pledgor shall be entitled to deliver to
Secured Party at any time;

     (iii) such Equity Securities as Pledgor has proposed in writing to deliver
as collateral for the Obligations, and which Secured Party has agreed in its
sole discretion to accept as such, that may be delivered to Secured Party
hereunder from time to time as collateral for the Obligations;

     (iv) all dividends, interests, cash, instruments and other property from
time to time received, receivable or otherwise distributed in respect of or in
exchange for any or all of the Collateral; and

     (v) all proceeds of the foregoing.

     2.2 Delivery of Collateral. (a) On the date hereof, Pledgor has delivered
         ----------------------
to Secured Party unlegended certificates representing the Initial Pledged
Shares, together with duly executed instruments of assignment in blank, with
signatures appropriately guaranteed.

     (b) Pledgor is required under the Purchase Agreement to maintain pledged
with Secured Party such number of Pledged Shares or other Collateral as is
required so that the aggregate Value of the Collateral is not less than the
Minimum Required Amount at any time. To facilitate compliance with such
obligation, Secured Party shall calculate the Value of the Collateral, and
notify Pledgor thereof on a daily basis; provided, that for purposes of such
calculation the "Value" of the Pledged Shares on any date shall be the average
of the Closing Bid Prices therefor on the prior five (5) Trading Days. If on any
date the Value of the Collateral is less than the Minimum Required Amount,
Secured Party shall so notify Pledgor and Pledgor shall deliver and pledge,
within five (5) business days thereof, such additional Pledged Shares or other
Collateral as is necessary so that the Value of the Collateral pledged to or
otherwise under the control of Secured Party is not less than the Target
Amount, as computed on the date of, and after giving effect to, such delivery
and pledge.

     (c) All further deliveries of Collateral hereunder shall be made to, and
held under the control of, Secured Party. Pledged Shares shall be evidenced by
physical certificates, which shall be delivered to Secured Party without
restrictive legends and free from restriction of any kind (other than
restrictions that may arise under securities laws due to Pledgor's relationship
to BLCI). Cash, Cash Equivalents and Equity Securities shall be delivered to an
account under the control of Secured Party, free from restriction of any kind.
On delivery, all Pledged Shares shall be in suitable form for transfer by
delivery or shall be accompanied by duly

                                       3
<PAGE>
 
executed instruments of transfer or assignment in blank, with signatures
appropriately guaranteed, all in form and substance satisfactory to Secured
Party. A11 other property comprising part of the Collateral (including Pledged
Shares on deposit with a clearing corporation) shall be accompanied by proper
instruments of transfer or assignment duly executed by Pledgor and such other
instruments or documents as Secured Party may reasonably request. Secured Party
shall have the right at any time to exchange certificates or instruments
representing or evidencing Collateral for certificates or instruments of smaller
or larger denominations which new certificate shall represent, together with any
remaining initial or other replacement certificates then outstanding, the same
aggregate number of shares constituting the Collateral.

     2.3  Voting Rights Prior to Default. Unless and until Secured Party shall
          ------------------------------
otherwise notify Pledgor after a Mandatory Redemption Event has occurred and is
continuing, Pledgor may exercise or refrain from exercising any and all voting
and other consensual rights pertaining to the Pledged Shares or any part
thereof; provided, that Pledgor shall not exercise or refrain from exercising
any such rights where the consequence of such action or inaction would be (i) to
impair any Collateral, the security interest granted to Secured Party therein,
the first priority of such security interest or Secured Party's rights and
remedies hereunder with respect to any Collateral or (ii) to breach or violate
any representation, warranty or covenant under the Purchase Agreement or any
other Transaction Document in any material way or (iii) otherwise inconsistent
with the terms of this Agreement and the other Transaction Documents in any
material way.

     2.4  Dividends Etc. Prior to Default. Unless and until Secured Party shall
          -------------------------------
otherwise notify Pledgor after a Mandatory Redemption Event has occurred and is
continuing, Pledgor may receive and retain all dividends and interest permitted
by the Purchase Agreement to be paid in cash in respect of the Pledged Shares or
other Collateral, except for any such dividends and interest and interest paid
in connection with a partial or total liquidation or dissolution or in
connection with a reduction of capital, capital surplus or paid-in-surplus.
Pledgor shall promptly deliver to Secured Party to hold as Collateral all
dividends which Pledgor is not entitled to receive and retain pursuant to the
preceding sentence, in the same form as so received (with any necessary
endorsement), and, until so delivered, shall hold such dividends and interest in
trust for the benefit of Secured Party, segregated from the other property or
funds of Pledgor.

     2.5  Release of Collateral on Exchange. (a) On receipt of a duly executed
          ---------------------------------
Exchange Notice, and provided that the Exchange Conditions are satisfied at
such time, Secured Party shall be entitled to instruct the Transfer Agent to re-
register into the name of Secured Party or its designee by the Delivery Date the
number of Exchange Shares specified in such Exchange Notice. In the event that
any of the Exchange Conditions shall not be met as of any Delivery Date, Secured
Party shall give prompt notice thereof to the Company.

     (b) If any Exchange would create a fractional Exchange Share, such
fractional Exchange Share shall be disregarded and the number of Exchange Shares
to be delivered on such

                                       4
<PAGE>
 
Exchange, in the aggregate, shall be the next higher number of Exchange Shares;
provided, that in any such case of fractional Exchange Share adjustment, the
principal outstanding under the Note shall be further automatically reduced,
at the Exchange Price, to reflect delivery of the balance of the fractional
Exchange Share.

     (c)  Secured Party shall maintain records showing the number of shares of
BLCI Stock delivered on each Exchange Date and remaining as Collateral
thereafter, and shall transmit a copy thereof to the Company following each
Exchange Date.

     2.6  Release of Excess Collateral. At any time when the Value of the
          ----------------------------
Collateral exceeds the Maximum Required Amount, Pledgor shall be entitled to
withdraw from pledge hereunder and the control of Secured Party upon written
notice, free of the security interest created hereby, shares of BLCI Stock or
other Collateral with a Value equal to such excess. Secured Party agrees to
release and deliver such Pledged Shares or other Collateral to Pledgor in
accordance with the preceding sentence.

3.   REPRESENTATIONS AND WARRANTIES.

     3.1  Representations and Warranties of Pledgor. Pledgor hereby makes the
          -----------------------------------------
following representations and warranties to Secured Party, which shall be deemed
repeated on each pledge and delivery of Collateral to Secured Party:

     (a)  It is a limited partnership duly formed, validly existing and in good
standing under the laws of the State of Illinois, with all requisite partnership
power and authority to enter into this Agreement and perform the transactions
contemplated herein and in the Purchase Agreement.

     (b)  This Agreement has been duly and validly authorized, executed and
delivered by it, and constitutes a valid and binding agreement, enforceable
against Pledgor, except as such enforceability may be subject to or affected by
applicable bankruptcy, insolvency, reorganization, moratorium or similar laws
affecting the rights of creditors generally and except as the enforceability of
the indemnification provisions hereof may be limited under federal or state
securities laws.

     (c)  Its execution, delivery and performance hereof are not in
contravention of any provision of its certificate of limited partnership or
agreement of limited partnership or of any indenture, agreement or
undertaking to which Pledgor is a party or by which Pledgor or its property are
bound.

     (d)  The Pledged Shares have been duly authorized and validly issued and
are fully paid and non-assessable.

                                       5
<PAGE>
 
     (e)  Pledgor is the legal and beneficial owner of the Collateral free and
clear of any lien, security interest, option or other charge or encumbrance
except for the security interest created by this Agreements.

     (f)  The pledge of the Collateral pursuant to this Agreement creates a
valid and perfected first priority security interest in the Collateral in favor
of Secured Party, securing the payment of the Obligations.

     (g)  No authorization, approval, or other action by, and no notice to or
filing with, any governmental authority or regulatory body is required either
(i) for the pledge by Pledgor of the Collateral pursuant to this Agreement or
for the execution, delivery or performance of the Agreement by Pledgor or
(ii) for the exercise by Secured Party of the voting or other rights provided
for in this Agreement or the remedies in respect of the Collateral pursuant to
this Agreement (except as may be required in connection with such disposition by
laws affecting the offering and sale of securities generally).

     (h)  There is no financing statement or security agreement which covers any
of the Collateral, and no such financing statement or security agreement is now
on file in any public office (other than such financing statements and security
agreements, if any, of which both written notice and true and correct copies
have heretofore been given by Pledgor to Secured Party).

     3.2  Representations and Warranties of Secured Party. Secured Party hereby
          -----------------------------------------------
makes the following representations and warranties to Pledgor:

     (a)  It is a limited partnership, duly formed and validly existing the
laws of the State of Delaware with full power and authority to enter into this
Agreement and perform the transactions contemplated herein.

     (b)  This Agreement has been duly and validly authorized, executed and
delivered by it, and constitutes a valid and binding agreement, enforceable
against it, except as such enforceability may be subject to or affected by
applicable bankruptcy, insolvency, reorganization, moratorium or similar laws
affected the rights of creditors generally and except as the enforceability of
the indemnification provisions hereof may be limited under federal or state
securities laws.

4.   COVENANTS OF PLEDGOR.

     (a)  Pledgor, at Pledgor's expense, shall promptly procure, execute and
deliver to Secured Party all documents, instruments and agreements and perform
all acts which are necessary or which Secured Party may reasonably request, to
establish, maintain, preserve, protect and perfect the Collateral, the security
interest granted to Secured Party therein and the first priority of such
security interest, or to enable Secured Party to exercise and enforce its

                                       6
<PAGE>
 
rights and remedies hereunder with respect to any Collateral. Without limiting
the generality of the preceding sentence, Pledgor shall (i) procure, execute and
deliver to Secured Party all stock powers, endorsements, assignments, financing
statements and other instruments of transfer reasonably requested by Secured
Party, (ii) deliver to Secured Party promptly on receipt the original
certificates for all Pledged Shares and all certificates, instruments and other
writings otherwise evidencing the Collateral, and (iii) cause the security
interest of Secured Party to be recorded or registered in the books of any
financial intermediary or clearing corporation requested by Secured Party, all
as may be necessary to establish, maintain, preserve, protect and perfect the
Collateral, the security interest granted to Secured Party therein and the first
priority of such security interest, or to enable Secured Party to exercise and
enforce its rights and remedies hereunder with respect to any Collateral.

     (b)  Pledgor shall pay promptly when due all taxes and other governmental
charges, all liens or encumbrances of any kind, and all other charges, now or
hereafter imposed on, relating to or affecting any Collateral.

     (c)  On demand by Secured Party after the occurrence and during the
continuance of any Mandatory Redemption Event, Pledgor shall deposit, or cause
to be deposited, all remittances, checks and other funds (in whatever form)
received with respect to the Collateral.

     (d)  Pledgor shall appear in and defend any action or proceeding which may
affect its title to or Secured Party's security interest in the Collateral if an
adverse decision is reasonably likely to have a material adverse effect thereon.

     (e)  Pledgor shall not surrender or lose possession of (other than to
Secured Party), sell, encumber, lease, rent, option, or otherwise dispose of or
transfer any Collateral or right or interest therein except as permitted in the
Purchase Agreement, and Pledgor shall keep the Collateral free of all liens or
encumbrances of any kind except as contemplated by or permitted under the
Purchase Agreement.

     (f)  Pledgor will furnish Secured Party from time to time with such
additional information and copies of such documents relating to this Agreement,
the Collateral, the Obligations and Pledgor's financial condition as Secured
Party may reasonably request.

5.   REMEDIES.

     5.1  Events of Default. Pledgor shall be deemed in default under this
          -----------------
Agreement on the occurrence and during the continuance of any Mandatory
Redemption Event.

     5.2  Remedies. On the occurrence and during the continuance of a Mandatory
          --------
Redemption Event, Secured Party may declare the Obligations to be due and
payable as specified in Section 5.1 of the Note, whereon the same shall become
forthwith due and payable, without

                                       7
<PAGE>
 
presentment, demand, protest or other notice of any kind (except in the case of
notice which is expressly required to be given hereunder or under the other
Transaction Documents), all of which are hereby waived by Pledgor to the extent
permitted by applicable law, and in the event Pledgor fails to make payment as
required by the Note, Secured Party may exercise all the rights, powers and
remedies vested in it (whether by this Agreement or any other Transaction
Document or by law) for the protection and enforcement of its rights in respect
of the Collateral, including, without limitation, the following rights, which
Pledgor hereby agrees to be commercially reasonable:

     (i) to receive directly all amounts payable in respect of the Collateral;

     (ii) to transfer all or any part of the Pledged Shares or other Collateral
into the name of Secured Party or its nominee(s) or designee(s);

     (iii) to vote all or any part of the Pledged Shares (whether or not
transferred into the name of Secured Party) and give all consents, waivers and
ratifications in respect of the Collateral, and otherwise act with respect
thereto as though it were the outright owner thereof; provided, that Secured
Party shall first have given written notice of its intent to vote such Pledged
Shares in order to obtain such right; and

     (iv) at any time or from time to time, to sell, assign and deliver, or
grant options to purchase, all or any part of the Collateral, or any interest
therein, at any public or private sale, without demand of performance,
advertisement or notice of intention to sell (or of the time or place of sale or
adjournment thereof) or to redeem or otherwise (all of which are, to the extent
permitted by applicable law, hereby waived by Pledgor), for cash or credit or
for other property, for immediate or future delivery without any assumption of
credit risk, and for such price or prices and on such terms as Secured Party in
its absolute discretion may determine. Pledgor hereby waives and releases to the
fullest extent permitted by applicable law any right or equity of redemption
with respect to the Collateral, whether before or after sale hereunder, and all
rights, if any, of marshalling the Collateral and any other security for the
Obligations or otherwise. At any such sale, unless prohibited by applicable law,
Secured Party may bid for and purchase all or any part of the Collateral so sold
free from any such right or equity of redemption. To the fullest extent
permitted by applicable law, Secured Party shall not be liable for failure to
collect or realize on any or all of the Collateral or for any delay in so doing
nor shall it be under any obligation to take any action whatsoever with regard
thereto.

     5.3  Sale. Secured Party shall not be obligated to make any sale of
          ----
Collateral regardless of notice of sale having been given. Secured Party may
adjourn any public or private sale from time to time and such sale may be made
at the time and place to which it was so adjourned. Pledgor agrees that to the
extent notice of any such sale or an adjournment thereof is required by law
(notwithstanding the waiver of such notice herein) and the applicable statutes
do not specify the minimum notice period required, Secured Party need not give
more than five (5) business days' notice of the time and place of any public
sale or of the time after which a private sale may take place and that such
notice is reasonable notification of such matters.

                                       8
<PAGE>
 
     5.4  Voting Rights and Dividends. On the occurrence and during the 
          ---------------------------
continuance of a Mandatory Redemption Event, Pledgor's rights to exercise the 
voting and other consensual rights which it would otherwise be entitled to 
exercise pursuant to Section 2.3, and to receive dividends and other payments 
which it would otherwise be authorized to receive and retain pursuant to Section
2.4, shall cease on notice from Secured Party, and all such rights shall thereon
become vested in Secured Party which shall have the sole right (but not the 
obligation) to exercise such voting and other consensual rights and to receive 
and hold as Collateral such dividends and interest payments.

     5.5  Securities Laws. (a) Pledgor acknowledges and recognizes that Secured
          ---------------
Party may be unable to effect a public sale of all or a part of the Pledged
Shares and may be compelled to resort to one or more private sales to a
restricted group of purchasers who will be obligated to agree, among other
things, to acquire the Pledged Shares for their own account, for investment and
not with a view to the distribution or resale thereof. Pledgor acknowledges that
any such private sales may be at prices and on terms less favorable to Secured
Party than those of public sales. Pledgor agrees that the conduct of such
private sales so as to avoid the violation of any applicable law shall not in
and of itself result in such sale being deemed not to have been made in a
commercially reasonable manner and that Secured Party has no obligation to delay
sale of any Pledged Shares to permit the issuer thereof to register it for
public sale under the Securities Act or under any state securities law.

     (b) On the occurrence of a Mandatory Redemption Date, if Secured Party 
desires to sell any Pledged Shares at a public or private sale, and in 
connection with such sale, in the reasonable opinion of Secured Party, (I) no 
exemption from the registration provisions of the Securities Act is available, 
and (II) resales of the Pledged Shares may not at such time be made under the 
registration statement pursuant to the Registration Rights Agreement, Pledgor 
will, on the written request of Secured Party, at Pledgor's own expense:

          (i) use its best efforts to cause such Pledged Shares to be registered
     under the provisions of the Securities Act (whether or not Form S-3 is
     available therefor), and to cause the registration statement relating
     thereto to become effective and to remain effective for such period as
     prospectuses are required by law to be furnished, and to make all
     amendments and supplements thereto and to the related prospectus which, in
     the opinion of Secured Party, are necessary or advisable, all in conformity
     with the requirements of the Securities Act and the rules and regulations
     thereunder;

          (ii) indemnify, defend and hold harmless Secured Party and any
     underwriter from and against all losses, liability, expenses, costs, fees
     and disbursements of counsel (including, without limitation, a reasonable
     estimate of the cost to Secured Party of legal counsel), and claims
     (including the costs of investigation) which they may incur insofar as such
     loss, liability, expense or claim arises out of or is based on any alleged
     untrue statement of a material fact contained in any prospectus (or any
     amendment or supplement thereto) or in any

                                       9
<PAGE>
 
     notification or offering circular, or arises out of or is based on any
     alleged omission to state a material fact required to be stated therein or
     necessary to make the statements in any thereof not misleading, except
     insofar as the same may have been caused by any untrue statement or
     omission based on information furnished in writing to Pledgor or BLCI by
     Secured Party expressly for use therein;

          (iii) use its best efforts to qualify such Pledged Shares under the
     state securities or "Blue Sky" laws and to obtain all necessary
     governmental approvals for the sale of such Pledged Shares, as requested by
     Secured Party;

          (iv) use its best efforts to cause BLCI to make available to its
     security holders, as soon as practicable, an earnings statement which will
     satisfy the provisions of Section 11(a) of the Securities Act;

          (v) bear all costs and expenses of carrying out their obligations
     under this Section 5.5; and

          (vi) use its best efforts to do or cause to be done all such other
     acts and things as may be necessary to make such sale of Pledged Shares or
     any part thereof valid and binding and in compliance with all applicable
     law.

Nothing in this subsection 5.5(b) shall in any way alter the rights of Secured
Party under subsection 5.5(a) above. Pledgor acknowledges that there is no
adequate remedy at law for failure by it to comply with the provisions of this
Section 5.5 and that such failure would not be adequately compensable in
damages, and therefore agrees that its agreements contained in this Section 5.5
may be specifically enforced.

     5.6  Appointment of Attorney-in-Fact. Pledgor hereby irrevocably appoints
          -------------------------------
Secured Party, effective on a Mandatory Redemption Date (for so long as such
Mandatory Redemption Event is continuing), as its attorney-in-fact, with full
power of substitution, and agrees that Secured Party or such substituted
attorney-in-fact may perform (but shall not be obligated to and shall incur no
liability to Pledgor or any third party for failure so to do) any act which
Pledgor is obligated by this Agreement to perform, and to exercise such rights
and powers as Pledgor might exercise with respect to the Collateral, including,
without limitation, the right to (i) collect by legal proceedings or otherwise
and endorse, receive and receipt for all dividends, interest, payments, proceeds
and other sums and property now or hereafter payable on or on account of the
Collateral; (ii) enter into any extension reorganization deposit, merger,
consolidation or other agreement pertaining to, or deposit, surrender, accept,
hold or apply other property in exchange for the Collateral; (iii) insure,
process, preserve and enforce the Collateral; (iv) make any compromise or
settlement, and take any action it deems advisable, with respect to the
Collateral; (v) pay any indebtedness of Pledgor relating to the Collateral, and
(vi) execute financing statements and other documents, instruments and
agreements required hereunder.

                                       10
<PAGE>
 
     5.7  Application of Proceeds. In the event Secured Party sells or otherwise
          -----------------------
disposes of the Collateral in the course of exercising the remedies provided for
in Section 5, any amounts held, realized or received by Secured Party pursuant
to the provisions hereof, including the proceeds of the sale of any of the
Collateral or any part thereof, shall be applied by Secured Party (i) first
toward the payment of any costs and expenses actually incurred by Secured Party
in enforcing this Agreement, in realizing on or protecting any Collateral and in
enforcing or collecting any Obligations or any guaranty thereof, including,
without limitation, actual attorneys' fees and expenses incurred by Secured
Party (all of which costs and expenses are within the Obligations and secured by
the Collateral), and (ii) then between interest and principal as Secured Party
may elect. Any amounts and any Collateral remaining after such application and
after payment to Secured Party of all of the Obligations in full shall be paid
or delivered to Pledgor, its successor or assigns, or as a court of competent
jurisdiction may direct.

     5.8  Standard of Care. Secured Party shall be deemed to have exercised
          ----------------
reasonable care in the custody and preservation of the Collateral in its
possession if the Collateral is accorded treatment substantially equivalent to
that which Secured Party accords its own property, it being understood that
Secured Party shall not have any responsibility for (i) ascertaining or taking
action with respect to calls, conversions, exchanges, maturities, tenders or
other matters relative to any Collateral, whether or not Secured Party has or is
deemed to have knowledge of such matters, or (ii) taking any necessary steps to
preserve rights against any parties with respect to any Collateral.


6.  MISCELLANEOUS.

     6.1  Termination. This Agreement and the security interest created
          -----------
hereunder shall terminate when all the Obligations have been indefeasibly paid
in full, at which time Secured Party shall execute and deliver to Pledgor all
documents which Pledgor shall reasonably request to evidence termination of such
security interest and shall return physical possession of any Collateral then
held by Secured Party to Pledgor; provided, that all indemnities of Pledgor
contained in this Agreement shall survive and remain in full force and effect
regardless of the termination of the security interest or this Agreement.

     6.2  Fees and Expenses. Pledgor agrees to pay promptly following written
          -----------------
demand all out-of-pocket expenses (including the reasonable fees and expenses of
Secured Party's counsel, experts and agents) in any way relating to (i) the
administration of this Agreement, (ii) the custody or preservation of, or the
sale of, collection from, or other realization on, any of the Collateral, (iii)
the exercise or enforcement of any of the rights of Secured Party hereunder, or
(iv) the failure by Pledgor to perform or observe any of the provisions hereof,
and Pledgor further agrees that the Collateral secures its obligation to make
any such payment.

     6.3  Indemnity. Pledgor shall indemnify Secured Party from and against any
          ---------
and all claims, losses and liabilities growing out of or resulting from this
Agreement (including,

                                      11
<PAGE>
 
without limitation, enforcement of the Purchase Agreement or this Agreement and
all claims and demands of all persons at any time claiming the Collateral or any
interest therein), except claims, losses or liabilities resulting from Secured
Party's gross negligence or willful misconduct, as the case may be.

     6.4  Notices. All notices, communications and instructions required or
          -------
desired to be given under this Agreement shall be in writing and shall be deemed
to given when delivered personally or by verifiable facsimile transmission (with
a hard copy to follow by nationally recognized air courier) or on the next
business day after timely delivery to a nationally recognized overnight courier,
guarantying next day delivery, delivery charges prepaid, or sent by registered
or certified mail, return receipt requested, postage prepaid, to the following
addresses:

          If to the Pledgor:

          Prime Group VI, L.P.
          c/o The Prime Group, Inc.
          77 West Wacker Drive, Suite 3900
          Chicago, Illinois 60601
          Attn: Michael W. Reschke

          Tel: 312-917-4201
          Fax: 312-917-1511

          with a copy to:

          The Prime Group, Inc. 
          77 West Wacker Drive, Suite 3900 
          Chicago, Illinois 60601 
          Attn: Robert J. Rudnik, Esq.

          Tel: 312-917-4234
          Fax: 312-917-1684

          with a copy to:

          Winston & Strawn
          35 West Wacker Drive
          Chicago, Illinois 60601
          Attn: Wayne D. Boberg, Esq.

          Tel: 312-538-5600
          Fax: 312-558-5700

                                      12
<PAGE>
 

          If to Secured Party:

          Och-Ziff Capital Management, L.P.
          153 East 53rd Street, 43rd Floor
          New York, New York 10022
          Attn: Joel Frank, Chief Financial Officer

          Tel: 212-292-5956
          Fax: 212-292-5950

or to such other address as shall be designated by a party writing to the
others.

     6.5  Survival; Severability. The representations, warranties, covenants and
          ----------------------
indemnities made by the parties herein shall survive the execution and delivery
hereof notwithstanding any due diligence investigation made by or on behalf of
the party seeking to rely thereon. In the event that any provision of this
Agreement becomes or is declared by a court of competent jurisdiction to be
illegal, unenforceable or void, this Agreement shall continue in full force and
effect without said provision; provided, that in such case the parties shall
negotiate in good faith to replace such provision with a new provision which is
not illegal, unenforceable or void, as long as such new provision does not
materially change the economic benefits of this Agreement to the parties.

     6.6  Successors and Assigns. The terms and conditions of this Agreement
          ----------------------
shall inure to the benefit of and be binding on the respective successors and
assigns of the parties; provided, that Pledgor shall not assign its right or
obligations hereunder without the prior written consent of Secured Party.
Nothing in this Agreement, express or implied, is intended to confer on any
party other than the parties hereto or their respective successors and assigns
any rights, remedies, obligations or liabilities under or by reason of this
Agreement, except as expressly provided in this Agreement. Secured Party may
assign its rights hereunder, in connection with any private sale or transfer of
the Note, so long as, as a condition precedent to such transfer, the transferee
executes an acknowledgment agreeing to be bound by the applicable provisions of
this Agreement, in which case the term "Secured Party" shall be deemed to refer
to such transferee as though such transferee were an original signatory hereto.

     6.7  Injunctive Relief. The Company acknowledges that a breach by it of its
          -----------------
obligations hereunder may cause irreparable harm to Secured Party and that the
remedy or remedies at law for any such breach may be inadequate and agrees, in
the event of any such breach, in addition to all other available remedies.
Secured Party shall have the right to obtain equitable relief to enforce this
Agreement to the extent such relief is available.

     6.8  Counterparts. This Agreement may be executed in any number of
          ------------
counterparts, each of which shall be an original, and all of which shall
together constitute but one and the same instrument.

                                      13
<PAGE>
 
     6.9  Entire Agreement; Amendments. This Agreement, the Note and the other
          ----------------------------
Transaction Documents constitute the entire agreement between the parties with
regard to the subject matter hereof and thereof, superseding all prior
agreements or understandings, whether written or oral, between the parties.
Except as expressly provided herein, neither this Agreement nor any term hereof
may be amended except pursuant to a written instrument executed by the Company
and Secured Party, and no provision hereof may be waived other than by a written
instrument signed by the party against whom enforcement of any such waiver is
sought.

     6.10  Governing Law; Consent to Jurisdiction. (a) This Agreement shall be
           --------------------------------------
governed by and construed in accordance with the substantive laws of the State
of New York, without giving effect to the choice of law provisions thereof,
except to the extent that the validity or perfection of the security interest
hereunder, or remedies hereunder, in respect of any particular Collateral are
governed by the laws of a jurisdiction other than the State of New York.

     (b) Pledgor hereby irrevocably agrees that, subject to Secured Party's sole
and absolute election, all actions or proceedings which in any manner arise out
of or in connection with or are in any way related to this Agreement or the
other Transaction Documents shall be litigated in courts having situs within the
County of New York, State of New York, and Pledgor hereby consents to the
jurisdiction of any state or federal court located with the County of New York,
State of New York. Pledgor hereby waives any right it may have to transfer or
change the venue of any litigation between grantor and purchaser in accordance
with this paragraph.

     6.11  Waiver of Jury Trial. EACH OF PLEDGOR AND SECURED PARTY HEREBY
           --------------------
KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY in
any action or proceeding which in any manner arises out of or in connection with
or is in any way related to this agreement or any of the transactions
contemplated herein. The provisions of this Section 6.11 are a material
inducement for Secured Party entering into this Agreement and the transactions
contemplated herein. Pledgor hereby acknowledges that it has reviewed the
provisions of this Section 6.11 with its independent counsel.

                                       14
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the date first above written.


                                       PLEDGOR:


                                       PRIME GROUP VI, L.P. 
                                       By: PGLP, Inc. 
                                           its Managing General Partner

                                       By: /s/ SIGNATURE ILLEGIBLE
                                           -----------------------------------
                                       Name: Jeffrey A. Patterson
                                       Title: Vice President


                                       SECURED PARTY:

                                       OCH-ZIFF CAPITAL MANAGEMENT, L.P. 
                                       By: OCH-ZIFF ASSOCIATES, L.L.C., 
                                           its General Partner

                                       By: /s/ DANIEL S. OCH
                                           -----------------------------------
                                       Name: Daniel S. Och
                                       Title: Managing Member

                                      15

<PAGE>

                                                                     EXHIBIT XIV

 
                               FORM OF GUARANTY

     This GUARANTY dated as of December 5, 1997 is by __________________________
(the "Guarantor") in favor of Och-Ziff Capital Management, L.P., a Delaware
limited partnership (the "Purchaser").

                                   RECITALS:
                                   ---------

     A.  Prime Group VI, L.P., an Illinois limited partnership (the "Company"),
has entered into a Note Purchase Agreement, dated as of the date hereof (as at
any time amended, restated, modified or supplemented, the "Note Purchase
Agreement"), with the Purchaser, pursuant to which the Purchaser has agreed to
purchase the Note (as defined in the Note Purchase Agreement) from the Company.

     B.  The Guarantor is a limited partner of the Company.

     C.  The Guarantor will derive substantial economic benefits from the
Company's sale of the Note and application of proceeds thereunder.

     D.  In connection with the purchase of the Note under the Note Purchase
Agreement, and as a condition precedent thereto, the Purchaser is requiring that
the Guarantor shall have executed and delivered this Guaranty.

     NOW, THEREFORE, in consideration of the premises and the covenants
hereinafter contained, and to induce the Purchaser to purchase the Note under
the Note Purchase Agreement, it is agreed as follows:

     Section 1.  DEFINITIONS.  Capitalized terms used herein shall have the
                 -----------
meanings assigned to them in the Note Purchase Agreement, unless the context
otherwise requires or unless otherwise defined herein. References to this
"Guaranty" shall mean this Guaranty, including all amendments, modifications and
supplements, and shall refer to this Guaranty as the same may be in effect at
the time such reference becomes operative.

     Section 2.  GUARANTY.

     2.1  Guaranty.  The Guarantor hereby guarantees to the Purchaser, and its
          -------- 
successors and assigns, the prompt payment in full when due (whether at stated
maturity, by acceleration or otherwise) of the principal of and interest on the
Note purchased by the Purchaser to, and the Note held by the Purchaser of, the
Company and all other amounts from time to time owing to the Purchaser by the
Company under the Note Purchase Agreement, the Note and any of the other
Transaction Documents (such obligations being herein collectively referred to
as, the "Guaranteed Obligations"). The Guarantor hereby further agrees that, if
the Company shall

<PAGE>
 

fail to pay in full when due (whether at stated maturity, on a Mandatory
Redemption Event, by acceleration or otherwise) any of the Guaranteed
Obligations, the Guarantor will promptly pay the same, without any demand or
notice whatsoever, and that in the case of any extension of time of payment or
renewal of any of the Guaranteed Obligations, the same will be promptly paid in
full when due (whether at extended maturity, by acceleration or otherwise) in
accordance with the terms of such extension or renewal.

     2.2 Obligations Unconditional. The obligations of the Guarantor under
         -------------------------
Section 2.1 hereof are absolute and unconditional, irrespective of the value,
genuineness, validity, regularity or enforceability of the Note Purchase
Agreement, the Note or any other Transaction Documents or any substitution,
release or exchange of any other guarantee of or security for any of the
Guaranteed Obligations, and, to the fullest extent permitted by applicable law,
irrespective of any other circumstance whatsoever which might otherwise
constitute a legal or equitable discharge or defense of a surety or guarantor,
it being the intent of this Section 2.2 that the obligations of the Guarantor
hereunder shall be absolute and unconditional, under any and all circumstances.
Without limiting the generality of the foregoing, it is agreed that the
occurrence of any one or more of the following shall not affect the liability of
the Guarantor under this Guaranty:

          (i) at any time or from time to time, without notice to the Guarantor,
     the time for any performance of or compliance with any of the Guaranteed
     Obligations shall be extended, or such performance or compliance shall be
     waived;

          (ii) the performance (other than full performance or payment of the
     Guaranteed Obligations) or non-performance of any of the acts mentioned in
     any of the provisions of the Note Purchase Agreement or the Note or any
     other agreement or instrument referred to herein or therein;

          (iii) the maturity of any of the Guaranteed Obligations shall be
     accelerated, or any of the Guaranteed Obligations shall be modified,
     supplemented or amended in any respect, or any right under the Note
     Purchase Agreement or the Note or any other agreement or instrument
     referred to herein or therein shall be waived or any other guarantee of any
     of the Guaranteed Obligations or any security therefor shall be released or
     exchanged in whole or in part or otherwise dealt with; or

          (iv) any lien or security interest granted to, or in favor of, the
     Purchaser as security for any of the Guaranteed Obligations shall fail to
     be perfected.

The Guarantor hereby expressly waives, to the extent permitted by applicable
law, diligence, presentment, demand of payment, protest and all notices
whatsoever, and any requirement that the Purchaser exhaust any right, power or
remedy or proceed against the Company under the

                                       2
<PAGE>
 
Note Purchase Agreement or the Note or any other agreement or instrument
referred to herein or therein, or against any other Person under this Guaranty
or any other guarantee of, or security for, any of the Guaranteed Obligations.
Guarantor represents, warrants and agrees that, as of the date of this Guaranty,
its obligations under this Guaranty are not subject to any offsets or defenses,
of any kind, against the Purchaser. Guarantor further agrees that its
obligations under this Guaranty shall not be subject to any counterclaims,
offsets or defenses.

     2.3 Reinstatement. The obligations of the Guarantor under this Guaranty
         -------------
shall be automatically reinstated if and to the extent that, for any reason, any
payment by or on behalf of the Company in respect of the Guaranteed Obligations
is rescinded or must be otherwise restored by any holder of any of the
Guaranteed Obligations, whether as a result of any proceedings in bankruptcy or
reorganization or otherwise, and the Guarantor agrees that it will indemnify the
Purchaser on demand for all reasonable out-of-pocket costs and expenses
(including without limitation, reasonable fees of counsel) actually incurred by
the Purchaser in connection with such rescission or restoration.

     2.4 Subrogation. The Guarantor hereby agrees that it shall not exercise
         -----------
any right or remedy arising by reason of any performance by it of its guarantee
hereunder, whether by subrogation, reimbursement, indemnification or otherwise,
against the Company or any other guarantor of any of the Guaranteed Obligations
or any security for any of the Guaranteed Obligations.

    2.5 Remedies. The Guarantor agrees that, as between the Guarantor and the
        --------
Purchaser, the obligations of the Company under the Note Purchase Agreement and
the Note may be declared to be forthwith due and payable as provided in the Note
as against the Company and that, in the event of such declaration such
obligations (whether or not due and payable by the Company) shall forthwith
become due and payable by the Guarantor for purposes of Section 2.1. If the
Purchaser shall bring an action to enforce this Guaranty, the prevailing party
in such action shall be entitled to recover reasonable out-of-pocket costs and
attorney fees incurred in such action, including but not limited to costs and
fees incurred in connection with any provisional remedies, appeal, confirmation
or execution after judgment.

    2.6 Continuing Guarantee. The guarantee provided in this Guaranty is a
        --------------------
continuing guarantee, and shall apply to all Guaranteed Obligations whenever
arising.

    2.7 Existence. Guarantor (i) is a corporation duly organized, validly
        ---------
existing and in good standing under the laws of the state of its organization;
(ii) is duly qualified to do business and is in good standing under the laws of
each jurisdiction where its ownership or lease of property or the conduct of its
business requires such qualification (except for jurisdictions in which such
failure so to qualify or to be in good standing would not have a materially
adverse effect on (A) the business, operations, prospects or financial condition
of the Guarantor, or (B) Guarantor's ability to pay the Guaranteed Obligations
in accordance with the terms hereof); and (iii) has the requisite power and
authority and the legal right to own, pledge, mortgage and

                                       3
<PAGE>
 
operate its properties, to lease the property it operates under lease, and to
conduct its business as now, heretofore and proposed to be conducted.

     2.8 Executive Offices. Guarantor's executive office and principal place of
         -----------------
business are the same as set forth in Section 3.4 hereof (with respect to
notices).

     2.9 Power; Authorization; Enforceable Obligations. The execution, delivery
         --------------------------------------------- 
and performance of this Guaranty by the Guarantor are within Guarantor's powers,
have been duly authorized by all necessary or proper action, are not in
contravention of any provision of Guarantor's articles of incorporation or by
laws, will not violate any law or regulation, or any order or decree of any
court or governmental instrumentality to which the Guarantor is subject or by
which the Guarantor is bound, will not conflict with or result in the breach of,
or constitute a default under, any material indenture, mortgage, deed of trust,
lease, agreement or other material instrument to which the Guarantor is a party
or by which the Guarantor or any of its property is bound, will not result in
the creation or imposition of any Lien upon any of the property of the
Guarantor. This Guaranty has been duly executed and delivered on behalf of the
Guarantor, and constitutes a legal, valid and binding obligation of the
Guarantor, enforceable against the Guarantor in accordance with its terms,
except as enforceability may be limited by bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally or by general equity principles.

     2.10 Litigation. There is no legal or arbitral proceeding by or before
          ----------
any governmental authority now pending or (to the knowledge of the Guarantor)
threatened, against the Guarantor with respect to which an order adverse to the
Guarantor is reasonably likely and which, if adversely determined, could
reasonably be expected to have a material adverse effect on the financial
condition, operations, business or prospects of the Guarantor.

     2.11 Approvals. No authorizations, approvals or consents of, and no filings
          ---------
or registrations with, any governmental authority are necessary for the
execution, delivery or performance by the Guarantor of the Transaction Documents
to which the Guarantor is a party or for the validity or enforceability thereof,
except for Uniform Commercial Code filings in respect of the Liens created
pursuant to the Guarantor's Security Documents.

     2.12 Taxes. The Guarantor has filed all United States Federal income tax
          -----
returns and all other material tax returns which are required to be filed by it
and has paid all taxes due pursuant to such returns.

     2.13 Solvency. After giving effect to the assumption of the contingent
          --------
indebtedness under this Guaranty, the disbursement of the proceeds of the Note
and the other transactions contemplated by the Transaction Documents, the
Guarantor is solvent on the date hereof.

                                       4
<PAGE>
 
     2.14 Information. The Guarantor shall deliver to the Purchaser from time to
          ----------- 
time such information regarding the business, affairs or financial condition of
the Guarantor as the Purchaser may reasonably request.

     2.15 Notice of Litigation. The Guarantor will promptly give to the
          --------------------
Purchaser notice of any legal or arbitral proceedings by or before any
governmental authority, and any material development in respect of such legal or
other proceedings, affecting the Guarantor, except proceedings which are not
reasonably likely to be determined adversely to the Guarantor or which if
determined adversely to the Guarantor, could not reasonably be expected to have
a material adverse effect on the financial condition, operations, business or
prospects of the Guarantor.

     2.16 Maintenance of Existence. The Guarantor will preserve and maintain its
          ------------------------
existence.
          
     2.17 Modifications of Brookdale Documents. The Guarantor will not send any
          ------------------------------------
notice under, or request or consent to, any modification, supplement or waiver
of any of the provisions of the Registration Rights Agreement or other agreement
to which BLCI and the Guarantor are parties in a manner which adversely affects
the interests of the Company or the Purchaser without the prior written consent
of the Purchaser.

     2.18 Benefit of Guaranty. The provisions of this Guaranty are for the
          -------------------
benefit of the Purchaser and its successors and assigns, and nothing herein
contained shall impair, as between the Company and the Purchaser, the
obligations of Company under the Transaction Documents.
                                
     2.19 Further Assurances. The Guarantor agrees, upon the written request of
          ------------------
the Purchaser, to execute and deliver to the Purchaser, from time to time, any
additional instruments or documents reasonably considered necessary by the
Purchaser to cause this Guaranty to remain valid and effective in accordance
with its terms.

     2.20 Payments Free and Clear of Taxes. Any payments required to be made by
          --------------------------------
the Guarantor hereunder shall be made to the Purchaser, free and clear of and
without deduction for, any and all present and future taxes, withholdings,
levies, duties, and other governmental charges, excluding such income and
franchise taxes of the United States and any political subdivision thereof which
would otherwise have been payable by the Company if the Company had paid the
Guaranteed Obligations to Purchaser in accordance with the terms of the
Transaction Documents.


                                       5
<PAGE>
 
     Section 3. MISCELLANEOUS.
                -------------

     3.1 Entire Agreement; Amendments. This Guaranty, together with the other
         -----------------------------               
Transaction Documents, constitutes the entire agreement between the parties
with respect to the subject matter hereof and supersedes all prior agreements
relating to a guaranty of the amounts due under the Note and the other
Transaction Documents and/or the Guaranteed Obligations and may not be amended
or supplemented except by a writing signed by the Guarantor and the Purchaser.

     3.2 Headings. The headings in this Guaranty are for convenience of
         --------
reference only and are not part of the substance of this Guaranty.

     3.3 Severability. In the event that any one or more of the provisions
         ------------
contained in this Guaranty shall be determined to be invalid, illegal or
unenforceable in any respect for any reason, the validity, legality and
enforceability of any such provision or provisions in every other respect and
the remaining provisions of this Guaranty shall not be in any way impaired.

     3.4 Notices. A11 notices, communications and instructions required or
         -------
desired to be given under this Guaranty shall be in writing and shall be deemed
to given when delivered personally or by verifiable facsimile transmission (with
a hard copy to follow by nationally recognized air courier) or on the next
business day after timely delivery to a nationally recognized overnight courier,
guarantying next day delivery, delivery charges prepaid, or sent by registered
or certified mail, return receipt requested, postage prepaid, to the following
addresses:

     If to the Purchaser, at:

     Och-Ziff Capital Management, L.P. 
     153 East 53rd Street, 43rd Floor 
     New York, New York 10022 
     Attn: Joel Frank, Chief Financial Officer

     Tel: 212-292-5956
     Fax: 212-292-5950
 
     If to the Guarantor, at:
 
     --------------------------------     
     
     --------------------------------     

     --------------------------------     

     --------------------------------     
 
     
                                       6
<PAGE>

     Tel: 
          ----------------   
     Fax: 
          ----------------   


     with a copy to:

     -------------------------------
    
     -------------------------------

     -------------------------------

     -------------------------------
 
     Tel: 
         ----------------
     Fax: 
         ----------------
     
     With a copy to:

     Winston & Strawn
     35 W. Wacker Drive
     Chicago, Illinois 60601
     Attn: Wayne D. Boberg, Esq.

     Tel: 312-558-5600
     Fax: 312-558-5700

     3.5 Successors and Assigns. This Agreement shall be binding upon and inure
         ----------------------
to the benefit of the parties hereto and their respective successors and
permitted assigns. Neither the Guarantor nor the Purchaser may assign its rights
or obligations hereunder without the prior written consent of the other party;
provided, however, that the Purchaser may at any time assign all but not less
than all of its rights and obligations hereunder to a permitted assignee under
the Note, without the consent of the Guarantor.

     3.6 Non-Waiver. The failure of the Purchaser to enforce any right or remedy
         ----------
hereunder, or promptly to enforce any such right or remedy, shall not constitute
a waiver thereof, nor give rise to any estoppel against the Purchaser, nor
excuse the Guarantor from its obligations hereunder. Any waiver of any such
right or remedy by the Purchaser must be in writing and signed by the Purchaser.

     3.7 Termination. This Guaranty shall terminate and be of no further force
         -----------
or effect at such time as the Guaranteed Obligations shall be paid in full. Upon
payment in full of the Guaranteed Obligations, the Purchaser shall deliver to
the Guarantor such documents as the Guarantor may reasonably request to evidence
termination of this Guaranty.

                                       7
<PAGE>
 
     3.8 Counterparts. This Guaranty may be executed in counterparts which shall
         ------------
individually and collectively constitute one agreement.

     3.9 Non-Recourse. Anything contained herein, in the Note or in any other
         ------------
Basic Document to the contrary notwithstanding, no recourse shall be had for the
Guaranteed Obligations against any shareholder, agent, director, officer or
employee of the Guarantor. It is understood that the preceding sentence shall
not (A) apply to the obligations of the Guarantor set forth in this Guaranty and
(B) in the event of any malfeasance, such as fraud, misappropriation of funds or
intentional material misrepresentation estop the Purchaser from instituting or
prosecuting a legal action or proceeding or otherwise making a claim against the
Person or Persons committing such malfeasance.

     3.10 Governing Law; Consent to Jurisdiction. (a) This Guaranty shall be
          --------------------------------------
governed by and construed in accordance with the substantive laws of the State
of New York, without giving effect to the choice of law provisions thereof, or
remedies hereunder.

     (b) the Guarantor hereby irrevocably agrees that, subject to the
Purchaser's sole and absolute election, all actions or proceedings which in any
manner arise out of or in connection with or are in any way related to this
Guaranty or other related agreements shall be litigated in courts having situs
within the County of New York, State of New York, and the Guarantor hereby
consents to the jurisdiction of any state or federal court located with the
County of New York, State of New York. The Guarantor hereby waives any right it
may have to transfer or change the venue of any litigation between the Guarantor
and the Purchaser under this Guaranty.

     3.11 Waiver of Jury Trial. THE GUARANTOR HEREBY KNOWINGLY, VOLUNTARILY AND
          --------------------
INTENTIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY in any action or proceeding
which in any manner arises out of or in connection with or is in any way related
to this Guaranty or any of the transactions contemplated herein.

     IN WITNESS WHEREOF, the Guarantor has executed and delivered this Guaranty
as of the date first written above.

                                       ____________________________
              
                                       By: 
                                           ------------------------------------
                                       Name:   
                                             ----------------------------------
                                       Title:  
                                              ---------------------------------

                                       8
<PAGE>
 
Accepted and acknowledged by:

OCH-ZIFF CAPITAL MANAGEMENT, L.P.
By: OCH-ZIFF ASSOCIATES, L.L.C.,
    its General Partner

 By: 
     ---------------------------
 Name:   
       -------------------------
 Title:  
        ------------------------

                                       9



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