My wife and I have been doing this about once a month. Easy, great when family visits and you need to prepare a lot, and is a great way to get the little ones helping out as well. Thais like a good BBQ, and they love bacon, so what started out with just chicken livers and hearts has turned into a using mushrooms, baby corn, small sausages, shrimp, etc. No number of servings is stated, this is a make as much or as little as you like. The ingredients are suggested items but you can certainly use what you like or have on have on hand.
Over all this would be low cost and is a great way to feed a crowd. Get the kids involved, show them once and they will remember, try to keep up with them.