The #1 reason that Landlords fail, according to the American Apartment Owners' Association, is the landlord's failure to manage to the lease.  

Your interest rates are low. 8.5% is around the "market rate" for owner finance buyers right now...30-yr, fully-amortizing2.

Nate @Nate Marroquin   You can use the income from your tax returns on the current rental adding back your paper loss (depreciation) and add back the mortgage interest, property taxes, home owners insurance deductions on your tax returns. 

This isn't totally necessary, but meeting property owners if you need to is a great way to win a deal

@Chris Seveney The types of leads I'm targeting are absentee owners, vacant properties, pre-foreclosures, tax delinquencies, and probates. 

I’ve talked to a number of investors and they can’t get 10% down on owner finance transactions were the deed transfers at closing.I operate in 4 or 5 markets.

The problem is that you don't get an opportunity to do an inspection before you buy.If you buy pre-sale from the owner, you have arrears to bring current, getting the owner to move after you have solved their problem and taken the pressure off, along with the previously listed concerns.

Their owner is very aggressive and combative if you escalate any issues.

I know federally backed loans are required to give 30 days notice but I believe that because it is a triplex and the other two units aren't owner occupied it allows me to do a 3 day notice. 

Ask to speak with some of their current owners and current/former tenants.