Your plan seems just fine. When people say it's a mistake to become a preload sup they thinking in the general sense, Not necessarily in context of your plan.
Assuming that you will get your bachelors either way then you will either have the experience and resume addition or you won't. What your risking is being miserable for a couple years. I don't know about you guys, but as a sleep deprived preloader working 60+ hours a week and waiting to become a driver, I'm miserable almost every day.