Seller Financing Steps?

[Account Closed]

My neighbor is thinking of selling his rental property(now vacant). He's older and owns free and clear. He showed us the inside and it's all original (1979),It needs a totally rehab. I want to ask him to do seller financing. If I can come to an agreement, what next? Do I myself contact a title company and start the paperwork? Does he? Anyone know the average cost to do this(I live in MD)? Can anyone explain to me step by step the process after the buyer/seller agree to terms? Also, after say 5 years, how do you go about transitioning from a seller financed loan to a traditional loan? Sorry if that's a silly question :/