At the chain theatre I used to work for, we had one of those Gold Medal Hot Dog machines which would spin the dogs around. We didn't sell many hot dogs, and consequently, they would sit in there a long time. After they had sat there a long time, I always felt we should call it beef jerkey.
We did have a lot of waste, it wasn't worth selling for us. So, I stopped selling them for a while, then I put a microwave in the vending stand and we would just make them to order. This way, they are always fresh, and we have no waste. If I would do the $1.00 hot dog thing that I previously talked about, I would expect to sell a lot, so I would probably put them in a crock pot, so we could just quickly grab them. How you serve them is kind of up to you, little foil wrapper, little hot dog box, paper boat, plate, etc.