Leg, I wouldn't do it fwiw.
I sell for a Rent-to-Own company from the coast and I can give you some info on it, but you'll tie up your equity in your current home and then not be able to purchase another? (from what I've read about your situation?)
These companies take $5K to $10K down, non-refundable. Then they do a 2 year contract where part of the rent goes towards the down payment if they complete in 2 years; if not, all deposits and rents are non-refundable. They also build in the purchase price of the home; current price plus x% per year makes the purchase price. That way the title holder gets an ROI built in. I have some contracts I can email you, but as I said, I wouldn't. It's a rich mans game.
Cheers and good luck FSBOing your home; lol