All private lender want you to get the amount you want to borrow certified by your financial aid office as being within your budget. As they are required by federal law to not include expenses incured by your spouse, you essentially can't get additional funds for him/her. However, it is possible to for both of you to live on your student budget if you are very careful about money, get housemates, never eat out, take advantage of free entertainment opportunities, etc. Some students even manage this with kids, you just have to be very frugal.