Gumbo or Jambalaya and cornbread? I like the chicken and dumplings idea, too. Mmmm hmmm.
Here's a good gumbo recipe that my husband and stepson love - it says it serves 12 and that's definitely no joke. I have to halve it or we're eating it for days (which suits my husband just fine, actually

).
Chicken, Shrimp and Andouille Gumbo Recipe - Marcia Kiesel | Food & Wine
Red beans and rice with smoked sausage might go over well with that crowd, also.
ETA: Just noticed this is an old thread *lol* Oh well. Never hurts to have ideas for feeding a lot of people cheaply, eh?