If you have had your credit run by a lender, ask for a copy of the report and ask for their help. If they can't or won't provide it, let one of us know and we can review your report with you and tell you just what it would take in order to both improve your score and soon become eligible to get financing that will certainly be more advantageous than if you acted now.
If you are trying to use an FHA loan, they have a product called a 203k loan that you can use when you wish to buy a property that needs repairs or even if you want to add extra space. It does cost a bit more and the property has to be able to appraise for the amount of the purchase & the extra money that the loan will provide for renovation (i.e. as is purchase price is $60k, you borrow an extra $20k for the work that you want done, including getting new appliances, the home will need to be able to appraise at $80k or more). Even if a lender provides the regular FHA loan, they may not offer it so ask your agent for some lender referrals.