Just closed on a zero percent interest owner finance deal!
Yesterday I closed on my 8th rental unit. Its a 900 ft 2/1 that I bought for 54k, it's probably worth 70k as is. Terms were 5k down, and $450 principal-only payments till its paid off, so a little over 9 years. The first payment is due in October. It will rent for $800 a month and will require another $1500 to get it rent ready. The seller has put on a new roof, water heater, and water pipes the last few years so hopefully there won't be any major cap-ex.
I found this deal by putting an "I buy houses" post on the Facebook social network page of the small town I invest it, didn't cost me a cent. The owner had been renting it out to one deadbeat after another and was exhausted. I met him in person and I offered principal-only payments and he said he was okay with it, he was just tired of dealing with tenants.