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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash Flows from Operating Activities |  |  |
Net income | $ 1,424,528 | $ 6,547,252 | $ 4,169,090
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 18,410,811 | 14,684,248 | 15,568,973
Amortization of deferred finance costs | 239,755 | 338,201 | 216,069
(Income) from investments in joint venture | (160,715) | (1,678,554) | (1,640,054)
Allowance for doubtful accounts | 1,453,695 | 240,111 | 532,161
Change in operating assets and liabilities |  |  |
Proceeds from unconsolidated joint ventures | 25,000 | 445,000 | 7,517,432
(Increase) in rents receivable | (2,381,159) | 38,202 | (703,039)
Increase (Decrease) in accounts payable and accrued expense | (386,030) | 346,378 | 587,379
Decrease (Increase) in real estate tax escrow | (88,160) | 49,043 | (7,428)
Decrease (Increase) in prepaid expenses and other assets | (449,715) | (653,767) | (863,767)
Increase (Decrease) in advance rental payments and security deposits | (635,701) | 2,092,781 | 254,730
Total Adjustments | 16,027,781 | 15,901,643 | 21,462,456
Net cash provided by operating activities | 17,452,309 | 22,448,895 | 25,631,546
Cash Flows From Investing Activities |  |  |
Distribution in excess of investment in unconsolidated joint ventures | 1,536,732 | 3,450,781 | 16,012,954
(Investment) in unconsolidated joint ventures | (11,732) | (43,422) | (1,118,717)
Improvement of rental properties | (3,240,408) | (3,897,872) | (4,117,770)
Purchase of rental property |  | (28,787,130) | (13,213,294)
Net cash provided by (used in) investing activities | (1,715,408) | (29,277,643) | (2,436,827)
Cash Flows from Financing Activities |  |  |
Payment of financing costs | (136,326) | (446,459) | (148,004)
Proceeds of mortgage notes payable | 3,781,877 |  | 83,684
Proceeds notes payable | (1,000,000) | 16,000,000 | (15,000,000)
Principal payments of mortgage notes payable | (2,212,019) | (1,491,340) | (1,831,480)
Stock buyback | (394,031) | (4,050,137) |
Distributions to partners | (4,675,754) | (4,696,893) | (4,477,923)
Net cash provided by (used in) provided by financing activities | (4,636,253) | 5,315,171 | (21,373,723)
Net Increase (Decrease) in Cash and Cash Equivalents | 11,100,648 | (1,513,577) | 1,820,996
Cash and Cash Equivalents, at beginning of period | 7,546,324 | 9,059,901 | 7,238,905
Cash and Cash Equivalents, at end of period | $ 18,646,972 | $ 7,546,324 | $ 9,059,901

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