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REAL ESTATE INVESTMENTS - Property Purchase Price (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Purchase price and other acquisition costs $ 176,660,507 $ 93,253,505
Purchase deposits applied (2,000,000)  
Acquisition fees to affiliate (741,000) (2,702,043)
Acquisition of real estate before financing $ 173,919,507 $ 90,551,462