Seller Financing Question

[Morris Cohen]

I have a rental property that I was thinking of getting rid of. The property manager was terrible and the tenant isn’t taking care of the house. After firing the property manager, I have had increased exposure to the tenants. Apparently the tenant will be receiving a large settlement when her son turns 18 and expressed interested in buying the house all cash when that happens. I’d like to sell this now. I have a mortgage on the property for 80k and they purchase price would be around $130k. If I’m lending her $125k to buy the house but I don’t have the funds to pay off my $80k, what’s the best way to structure this?