I just graduated, so a couple thoughts. I don't have a ton of experience with loans, but I worked in academic advising while I was a student and I have a job now that involves thinking about money a lot.
- If you're going to be required to live in a dorm (at least for your freshmen year) and your fixed expenses will include a meal plan or something like that, you probably don't need to worry much about food. If you don't have extravagant tastes, $40-60/week is enough for the occasional meal/movie/booze on a budget every week, but obviously not enough to eat out every night or spend a ton partying/traveling/whatever on the weekends. You can definitely get away with less depending on how frugal you are and where you're living. How much entertainment costs is pretty tough to determine, since it's largely about what you want.
- Get an apartment with a few roommates as soon as you can and learn how to cook, at least a few dishes well, like others have said. At some point, take a Sunday to make a trip to the grocery store and figure out what a reasonable week's worth of groceries will cost in the area you're going to live. Where I went to school, I could buy groceries for a week on $40 or less if I wasn't spoiling myself with the best cuts of meat or anything; but where I'm living now, $40 is clearly a floor, not a ceiling. Food prices vary a lot by city. But rent and groceries will almost certainly be substantially less than food and lodging on-campus if you have a few roommates.
- Check and see if the student loans you're likely to get, or the income you'd like to or expect to have (or worry about having) after graduating, would qualify you for for Income-Based Repayment. Even if you end having to borrow a ton, this can prevent you from being in a situation where you're stuck with loan payments that eat up all of your money. Here's a wikipedia article: http://en.wikipedia.org/wiki/Income-Based_Repayment I'm not American so sadly I don't know much more.
- Don't expect to get carried away with partying, or at least, plan to party on the cheap. Booze can soak up cash really quickly.
- Be sure to work in transportation costs, like others have said.
- Feel free to investigate, er, non-traditional ways of acquiring textbooks.
- Have you factored in money from summer jobs?
- I would definitely advise going to a UC or somewhere similar, instead of a CC. It`s tough to find work without a degree and it can be complicated to transfer. But $80k is a lot of debt -- if you can find a way to get that down at all by working and budgeting, you'll be a lot happier when you graduate.