If possible you need to purchase a home with a home mortgage. If you are not able to make a down payment at this moment or do not have the money for a down payment. Then a rent to own may not be a bad solution. The biggest drawback to this kind of transaction is that there are not many homes listed with this type of contract available.
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Typically the lease agreement will be written with an option period for the tenant to exercise their right to buy the home. The buyer may pay the seller a fee for being able to exercise this right. In return the seller sets a purchase price for the home. The option may specify terms which the buyer will have to satisfy in order to purchase the home. The contract may be written as one agreement or as a separate lease and purchase agreement. I would advise you to start immediately on repairing your credit if you enter into a rent to own contract.