My opinion, get legal advice. He has the money to pay for the house, but does that mean he will make the payments or do the up keep. Nothing he says you can trust.
Talk to a real estate attorney and find out how to get rid of the home the "legal" way. It is not worth him scrxwing you over on your credit.
I know you have done your homework about leaving. Found a great place. You will be find. We are the first ones to tell you to get the hxll out of the house. We just don't want you to make a rash decision and jeopardize your credit. I don't think you have. Plan for the move in February, but plan for the sale also.
You will find peace Becki!!