Ok, sell audi, sell blazer, take out a loan for a cheap reliable lower mileage economy car.
Having a small monthly payment (under 200/month) shouldn’t be hard to do while going to school. I know I did it working 30 or so hours a week and going to school full time. Having a set payment you can budget for is a lot easier than having big repair bills pop up unexpectedly, like what happens when you drive beaters.