Two points about rent to own. First, you will likely be paying some sort of a premium for that arrangement, and I'm not sure it would be worth it. For example, you may have to compromise on the house to find an owner wanting to do the rent to own thing. Also, you may discover after moving here you don't like that neighborhood or that you prefer another neighborhood, in which case the premium you paid would be wasted.
Second, if you do this type of a deal, you clearly would need to hire a real estate attorney to review the documents and make sure they were in proper order.