YOU can’t borrow $40k/year; you can only get the ~$5500/year federal student loan. Your parents would have to borrow the ~$160k it would take to pay for this school. That’s not a good idea for any family, especially a Pell eligible one.
@Mom2collegekids can tell you all about med schools. I don’t think it matters where you go for undergrad. You can’t get in state rates in CA, so UCLA will never be affordable for your family. It’s unaffordable for many students. Do you have any options that you can pay for without asking your parents to take out loans?