Matt & Laura,
I would be careful of any rent to own properties. Most of the time they ask for a large down payment for you to rent out the property and if you are unable to buy it, then it is forfeited.
There are some homes that are listed for rent by Realtors with the option to purchase. But, you would need to go through a credit and background check to be approved.
I would talk with a mortgage broker to see how bad your credit is and to see how you can improve it.
I would be happy to reccomend a broker or to answer any other questions that you might have.
CG Real Estate