I say, apply and wait to see what kind of aid you get. We’re better at aid than you would assume given our size — especially with international students.
As for costs on campus, you can go all year without spending a dime. You probably won’t, but you could. Once you’re on campus everything is free: you can get all your food through the meal plan and all concerts are free as well. A class in the rec barn might have a one-time fee and you might have a health service co-pay; but beyond that you can pretty much get buy without spending any money.