Seller Financing due dilligence

[Ben Morrow]

I am selling a plot of land. I have offered seller financing to a buyer who is looking to subdivide. It would be a short term loan, maybe a year term, with 20% down making interest only payments with a balloon payment at the end when he gets a commercial loan to continue with his land development plans. What kind of due diligence should I be doing on the prospective buyer?  Credit check is a given, but should I do a background check or anything else?  Thanks for the help.