6 Plex in Buffalo, NY with owner financing

Hello, I am wondering what are the things I should be aware of when offering owner financing to buyers.

I own a 6 plex in Buffalo, NY (596 Ontario St.) that I would like to continue to get cash flow from, but feel that a local manager would generate more income from this property than I do from afar.   The goal is for the buyer to generate more money than he needs to pay me and make it so I don't need to spend more time looking after the place.  I'm willing to finance because I don't need the cash now, but would like the cash flow.

Thanks in advance to all you experts for sharing your experience.