Chris,
I think your plan to get an architeture degree is an excelent idea, that way you would always have something to fall back on. In aviation it really doesn't matter what your degree is in, it just helps to have one.
You could start now by finding a part time job and saving your money to pay for flying lessons during your school vacations. If you start at a local flying school you can pay for the lessons as you go (about $170 or so each time) which could help lessen the financial blow a bit. You don't have to do it all at once. So you could work on a rating each summer, that way by the time you graduate college you could have your degree and perhaps your Flight Instructor Certificate in hand.