bad credit mortgage loans in michigan

I have to get a mortgage. My credit is bad my scores between 500-550 r?

Is there a mortgage company in Michigan that can help? if I know where I come I have to go to the bank to pull the house I want? or should I talk to the bank to rent the house for a year then get a mortgage

I do not know about Michigan, but they forget that the bank and go talk to a mortgage broker, the'll tell him what to do, how to save for a down payment, and how to improve your credit and pay nothing until you buy your home