When serving nachos, there are several ways to go about doing it. If your concession stand has pretty heavy traffic, then it would be best to invest in a cabinet warmer. Buy your chips in bulk and keep them warm in this cabinet. Use a scoop to fill up the nacho trays and garnish with cheese and peppers.
If you have a smaller establishment, consider purchasing individually wrapped chips and cheese. They can be stored in heated merchandiser cabinets that will keep the chips from becoming stale and the cheese will not become lumpy and hard to pour. The small packages of chips and cheese can be sold to customers and they can prepare their nachos the way they want them to be prepared.