Hi, Nina. I owner financed a property I sold and I have extensively researched using owner financing to buy a property. Also, I live in Adair Park, less than a mile from that area.
My initial impression is your revenue expectations are probably a little inflated. Also, factor in that your turnover will be very high compared to most markets given the student population and low-income area.
I would start with a conversation before you put any numbers/facts/figures in front of them. They may reject the idea outright, but you need to be prepared to counter their objections right away. I would recommend researching USLegalForms and FCI Lender Services. You need the buyer to understand they will keep the security deed until/unless you completely pay them off. You can use a loan servicing company so it's totally impersonal and you can autodraft every month. FCI will even help the seller foreclose on you without the seller having to get their hands dirty.
You need to be prepared to pay premium interest and price point, especially if you want no money down First impressions, I would never do no money down owner-financing, even at premium interest and price point, as a seller because it doesn't allow the seller any buffer if they need to foreclose.
Let me know if you want to connect. I may be able to do a drive by when I'm back in town this weekend, if you want.