Sometimes this leads to astronomically high prices - if it doesn't sell at the high price point - the contract just expires, so the "seller" has ventured nothing and lost nothing.

@David Zheng, even with your scenario, what if YOU are the one to lose your job?

So, if I were to sell it by 2020 (within 3 years of turning it into rental), I pocket the entire capital gains on the property (roughly $65k) but I will instantly lose my $750/monthly cash flow from rent as well as all other tax deductions and depreciation I could benefit from each year. 

The only thing you could potentially lose is the one property vs ALL of the properties you have if you were to put all of them under one LLC.

If you run into trouble in the future you could lose all 4 properties.Instead, I'd see if each seller would let you take over the mortgage, pay the owner their equity and they move on with life.

They certainly caused me to lose money, my buyer, and time, but are the liable for this loss legally? 

I really don't want to lose the property but I see what your saying.

Drexel Blvd. that an EquityBuild venture bought for $5.7 million in January 2017, and four buildings with 56 units between 8326 and 8358 S.

Do you have any recommendations on selling without losing $18,000 in realator fees?

Sounds like you bought the place well before the rule of FHA loans never lose MIP.