The FHA househack strategy is fairly common and pretty straight forward, a lot of people have been using this and/or the conventional househack (myself included) so have been on both sides of the table. 

Or the market tanks and the value of the house goes down and that creates issues (selling at a loss, who brings money to the closing table, etc.

We do have plans to add a 'park style' grill, picnic table, maybe a few fire rings to make for more sites, but still aiming to keep it simple and cheap.

I once paid a $53,000 assignment fee; I can say, it was extremely upset when I got to the closing table, but even with that $53,000 assignment fee, I will still buying at at .40 on the dollar.

Negotiation Challenges: Risk of under-the-table deals with other buyers.Tips: Be aware of these risks and take steps to mitigate them.

Under the table is illegal. 

Were these signed contracts that blew up at the closing table, or just offers that you thought were going to stick and never did?

You already have this, its called being a shareholder of a company and a cap table. 2.

I am good at crunching numbers and also bring some capital to the table. 

I rent homes unfinished for the most part but sometimes, if a space would look better with something extra, like a coffee bar or a patio table, I will pick one up.