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RENTAL PROPERTIES (Hamilton Highlands) (Details)
Mar. 29, 2018
USD ($)
item
Dec. 31, 2019
item
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
item
RENTAL PROPERTIES        
Number of units | item   913 913 913
Line of credit     $ 18,000,000  
Hamilton Highlands LLC Residential Needham Massachusetts [Member]        
RENTAL PROPERTIES        
Number of units | item 79      
Loan amount $ 21,500,000      
Purchase price of real estate properties 34,500,000      
Cash payment 13,000,000      
Cash from reserves 5,000,000      
Line of credit 8,000,000      
Closing costs associated with financing 141,000      
Purchase price allocated to the value of the in-place leases 502,000      
Purchase price allocated to the value of the tenant relationships $ 40,000      
Amortization period of value of the in-place leases 12 months      
Amortization period of value of the tenant relationships 24 months