Usually the answer is NO. Most owners want to sell so they can move on to buy something else and they need the cash from the sale to do it. Rent to own is a horrible deal for renters since they seldom work out and the renter usually defaults because you still HAVE to get a loan to buy it. Sellers don't like them because they want to sell and move on and not wonder if you will be able to buy it in a year or two and then get it back in worse condition when you can't.
Just rent until you can actually get a loan to buy.