Here are two ways to get a mortgage as a B-school student
1. Purchase the home before you quit your job. Say the property is a 2nd home or an investment property. Don't leave your job until after your loan funds. One of the last things a lender does is re-verify employment.
2. If you've already quit your job, get a NO DOC or NINA (no income no asset) loan. These loans require no income documentation or employment verification. Stated income really isn't an option because lenders still verify employment. Stating that you earn 50k a year at a job you just quit is fraud. If you still have a job or legitimate business in B-School, Stated Income would be a good option.
Option 1 will probably get you a better rate, and require less money down, but it will vary from lender to lender. If anyone has questions about mortgage stuff, feel free to send me a pm.