You'll have to find the right lender. You should qualify for mortgage payments equal to about 1/3 of your monthly income. A small starter home, probably, depending on which area of the country you live in.
Contact a realtor. They can point you in the direction of a lender who can help you. Be wary of high interest, though, shop around for your loan. Get pre qualified before you even start looking.
If you're not planning to stay in the same area after you're through with school, you might want to wait to buy a home, they're hard to sell right now.