My .02 cents...I say you arrange for a couple of them to bring sides...mac and cheese, baked beans, slaw, corn bread etc....Simplify your menu a bit. Maybe some PP and some whole chickens. I usually buy my yard birds for $3-4 a piece. I know you probably want to impress them, but I'd let the yard bird and the PP do the talking...Plus you could buy $150 worth of meat, arrange for a couple of coworkers to bring some sides and everyone can bring their own adult beverages..Either way, your out a $100-200. But this way, you don't look like your making money off of your friends