Best way for my son to buy my house & I rent from him.

[Carolyn Hancock]

My son wants to buy my house from me & I will rent from him. This way I can retire & move back home, as I had to relocate for work.He would owe about $44,000. What is the best way to go about the sale, an attorney to over see the whole thing?
The house has been listed with an agent so he would have worked for 2 yrs for nothing, but I really can't afford to pay several thousand either. Your views, please.