Well, the simple answer is: Finance the property yourself (take a note) and sell this note to a note buyer to pay off the underlying mortgage and give you a profit.
Of course there’s a bit more involved, so I would suggest you read the “How to” articles on this site and learn all about it.
If I buy a prop. and L/O to someone how do I create owner-
financing so the t/b dose not have to go a lender at the time they execute the option to buy?
all advice is welcome and thanks so much!