If your parents have the money, morevthan you are letting on here, if you can show you can pay for Purdue with hard numbers to even get into this country , go right on ahead and go there. If your Situation is purely as you describe it, there is no further discussion or decision. You would not be able to afford Purdue.
No, I do not believe borrowing the difference is worth it. Or spending essential funds for Purdue vs UDallas.