There are more rent to own properties becoming available now than ever before..., call a Real Estate professional in your area and ask about it. If they do not seem to know, then ask another one. I bought 4 houses this year and two of them have tenants in them now on a Rent to Own program. You may also find a lot more sellers will be receptive to this idea if you present it to them, especially those who must sell.
Best of luck in your search,