Rent to owns are risky as they usually charge a high interest rate. They usually are more harsh when it comes to missing a payment since many times that is how they make their money. By kicking people out who miss a payment, keep all their money and 'resell' the home to the next.
Your best bet is to find a good loan officer and a good credit repair professional. I can point you in the direction of both, feel free to contact me. They can give you a good idea of how quickly you can get your credit up to be able to qualify for a loan.... more