We calculated the collateral value of each property, and told him we would be willing to do a release based on (1) a payoff of our estimate of that properties collateral value PLUS (2) a extra fee (profit) to us of $50,000.  

Did you get a chance to see the questions above?

If you do that, you have a much better chance at having a successful investment. 

There's a very good chance the issue(s) you face have already been discussed and answered.Ask questions in the appropriate forum.

If so they would have sold their house for (ultimately) $75,000 more than they did; received 9% interest (probably as much or more than if they invested the proceeds) on the amount they were waiting for, and if by some small chance the borrower/buyer defaulted, had an opportunity (along with the frustration, cost, etc) of reselling the property and obtaining a “windfall” profit.2.

Pro photos for the best chance to grab attention.

My CoC can only go DOWN since my rehab estimate is pretty solid. 

There's a very good chance the issue(s) you face have already been discussed and answered.Ask questions in the appropriate forum.

There's a very good chance the issue(s) you face have already been discussed and answered.Ask questions in the appropriate forum.

Have you already used a source to estimate the STR income?