I am not totally understanding what you are talking about. They gave your son a gift of $10,000. What is it that you want to do with your car, use that to lower your loan amount, therefore lowering your debt? It is not going to make it impossible for you to buy a home, unless you are in the process of doing it right now. This is something that might work out better discussing over the phone, so that you can explain exactly what is going on. If you would like to contact me, I would be happy to advise you about financing. Either call me at 516-972-1687, or e-mail me through the Trulia profile.