If you are looking at FHA because of credit score, then I would work on credit scores to qualify for conventional financing or see if you can get a very strong coborrower with high scores.  

Besides the obvious credit, background, and income verification.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

@David Naphy With a strong credit score you can do better than 8% on a DSCR based cash out refi today. 

@Jeffrey Bourque Are you planning to finance this with a local bank or credit union?

And they’ve cost me alone well over $30k in damages and lost rent thanks to their complete negligence.

It is debt you are obligating yourself to and lenders and the federal government think of it that way.Missing a payment doesn't mess up your credit, but it does mess up your day when you get sued or prosecuted. 

THANKS Your local credit union might be your best bet.

Quote from @Daron Williams: I just invested in a tax deed here in texas it was a beautiful lot right on lake sam rayburn. i have it on the market for sale the only problem is you have to have two lots to build on.. i found the person that owns the lot to the right of me and there willing to possibly sale there lot the only problem is i dont have the money or the credit  to purchase it.

Other than paying for an appraisal or BPO (and maybe a credit report), you should not pay a lender anything until your loan funds.