Don't they already have a cafeteria?
Sorry man, it sounds like you're screwed. I'm going out on a limb, but the "regime change" at your school sounds like the result of the NCLB Act, am I wrong? Not to pry, but I need to know if I now have another reason to hate the act.
I liked the AAP and Joe DeFranco ideas. And I agree with some of the other posts about wheelbarrows, tires, sledgehammers, sandbags, and compressed beverage tanks (for some reason I don't think kegs will go over well in a H.S. setting) being cheap, easy, and effective.
Just don't forget the little people who relatively anonymously contributed sympathy to your plight on an internet forum when you win the $192M, Okay?