OK, I'll be the guy to throw cold water on the whole thing. If all you want is to "break even", and cook for your friends, then learn to say no. Cook only what you can, when you can. Believe me, cooking BBQ for profit is NOT an easy business to succeed in. You have to be driven, and good at it. And even then there's no guarantees. Cook for fun, cover your expenses, and avoid the heartache.
That said, if I misread the tone of your post and you really want to do this right, good luck. Get an attorney, contact your local HD, take a serv-safe class, and go for it with everything you got!
Craig...Chief cook and pot washer, Prince of Peace Lutheran Church (LCMS)