Here are some cost estimates of food based on a 100 person party. I'm estimating 2 hotdogs and 1.5 hamburgers per person - I would rather be safe and spend an extra $100 to ensure everyone eats rather we run out of food....it's the mom in me. Take a look-see I'm sure I'm missing things. I estimated all on Sam's because I could get the numbers online. I'll be back with a 200 person party just for giggles. So I formatted it a bit strangely. The blue highlighted was the "product" I decided to go with. Let me know what see what you think and if I've made errors. The more I think of it- the more I think we will hit closer to 200.
I'm not sure how much charcoal its going to take. This is a world that I'm unaware of.