It has some pretty cool features such as court room, prison rooms, and radiation/bomb shelter.  

Cash flow is a function of your leverage. 

Find out somehow where their new address is (not sure how to find this out affordably), and file a lawsuit against them in small claims court and hope they pay or eventually get their wages garnished.2.)

If it is not that date, then for sure it would be before the Court confirms the auction sale (that is usually very quick after like a day or two.)  

I would check the median income of the area.It is a function of price and return on effort.

Verbal agreements mean nothing in court.

Lastly with that said amount I’d say you put most into liquidity for your health reasons and start out with something you can be able to afford when your health needs best part of so you don’t start worrying much on what to do further causing you higher health risks because RE isn’t a get rich quick…..That been said, the ball still in your court….!!!

The answer is probably simple and I apologize but my brain isn't fully functioning after staying up all night running numbers. 

Is it worth getting a real estate lawyer, sending a demand letter, going to small claims court, suing, or doing anything like that?

Everything seemed functional.