Alexandra,
All these answers are spot on. His income will not be used to qualify you for the loan. If his credit score is above 580 there are some lenders that offer loans. As Robin stated there are things that can be done to help improve his score such as "rapid re-score" if he qualifies.
If you would like to discuss your options and perform a free, no obligation pre-qualification I would be happy to sit down with you.
David P Cruickshank
Ardain Mortgage Corp
847-354-5455
davidc@ardain.com - Mon Mar 8, 2010