4oz is a good size to serve. Here is my theory on vending. Never run out of food, I use to run out and it will never happen again. You lose money when you run out. The best way to do this is have plenty of product that you can freeze and use for another event. Purchase a decent amount of rolls, maybe 320 (20 - 16 packs). If you start running low, send someone to the store. You may have to slow down service for a half hour, but your line we still be built. DO NOT RUN OUT OF FOOD.
Jacked UP BBQ vending
Ocean County Pig Assassins competition team retired and is now known as Jacked UP BBQ