I agree with what you are hearing from other posters. First of all the green card in the mail is no guarantee.
Second this is all very risky for your wife. You are asking her to live with her parents, work full time, take out expensive loans in her name for you, while you go off to college, live in a dorm and not work…?
Yea, no. If i were her mom/ sister/ best friend, etc I’d caution her.
Re: paying for your education. There is nothing that you can do until you have legal permission to reside in the US.
It would not be wise to make financial commitments until that is in your hands (not coming in the mail soon).