Rent to own for under $600 is hard to come by and investors in the area may grabs those up to purchase before you can even get a glance at them.
I would love to see what other avenues we can discuss. FHA financing only requires 3% down and VHDA loans can possibly get you to bring as little as $500 to table. (case by case bases).
Would you be interested in getting prequalified. Jeremy can also help with building your credit if that is the case. Either way, please call me I would love to speak with you to discuss all options. DONT GIVE UP! Home ownership is key:)