Hello Toski, it will depend on what state you are buying in. What state is it that you are considering a purchase?
You may consider 3.5% down FHA with a minimum 580 fico score and 3% down conventional from a minimum 620 fico score. If you have lower scores you may consider 10% down FHA with fico scores between 500-579.
Your scores can be raised within 3-4 days in most cases to qualify for programs, rates and terms as necessary. You have to be very careful in credit repair as you can not qualify for a mortgage with disputes on your reports.
You also have to be careful as to what old collections you pay off as they may lower your scores. FHA rates are lower and pencil out better on a mortgage payment. If you are considering FHA you may have up to 2k in old collections without penalty.
The web reference link below is licensed to lend in CA, AZ, NV, OR, WA, IL, CO, GA, MD, MI, TX, VA and DC ONLY.