So if I get this right. The first 500 people that show up at your vending site get ribs. Everyone else at the event will be eating other food? That may be a disaster waiting to happen. What happens when you run out of food? Who will they blame? I am glad you are willing to do this, but if you are looking to advertise you only reach 20% of the people at the event.
If you do 1/3 of a rack per person, that would be about 10 cases of ribs. The BB ribs I have been getting at Sam's are running about $2.69/lb. Average case is about $150. I don't know what spares are a case, but that may be an alternative.
These are just things that popped into my head. If you can swing it, please feed our troops and their families. I have done it and it is very rewarding.
Team: Pyle's BBQ; Good-One "Trail Boss" 60T; Homemade rig; 22" Weber Kettle w/rotisserie ring; Big A$$ Rotisserie; BGE-Small; Weber Kettle Gold, Weber OTS, New Braunfels offset smoker.
Saddles BBQ Bistro