There are loan programs out there that may accept lower credit scores. One of these is FHA. FHA's website states: "Minimum credit score requirements for FHA home loans depend on which FHA loan product the applicant needs. Generally speaking, to get maximum financing on typical new home purchases, applicants should have a credit score of 580 or better. Those with credit scores between 500 and 579 are, according the the FHA guidelines, 'limited to 90 percent LTV'." (Reference: http://www.fha.com/fha_article.cfm?id=200.
Other options can include buying on a land contract, subject 2, rent to own or getting a co-signer. Meanwhile, save every penny you can to put down on a property. Large down payments can offset a poor credit rating to a degree.