Purchase with Seller Rent-back? Tips to make it work?

[Tracy Cummins]

Hey BP community - There's a property I'm very interested in which the Seller is looking to do a rent-back situation up to 6 months following closing.  Once vacant, the house will need at minimum, duct replacement, refinished floors and fresh paint throughout to rid cigarette smoke and cat smell before moving in.  Assuming I really and truly want to make this deal work, what's the best way to proceed?  Looking for advice, pros/cons, best practices and pitfalls to avoid specifically on the rent-back piece.  TIA!!!