I have limited knowledge on this but from what I do know—this will be expensive!
As a kid I worked at a pizza joint and food costs on the salad bar always ate out lunch. heh
Produce prices always fluctuated the most, waste was often fairly big as some of the vegetables would get slimy or discolor pretty quick.
Rotating the crocks of salad dressing was important because you can really make someone sick if not tended to properly.
Salad bars aren’t cheap and can easily make people sick if someone tries to cut corners on their work.
All valid. And kids are funny. They are picky about what they will eat. They are probably going to end up with the least healthy things on the salad bar being the most popular (ie, canned fruits, sweetened things like 3 bean salad, etc). The nice fresh vegetables they imagine are going to go to waste for the most part. Anyone who thinks school lunches (especially FREE school lunches) are a good idea should go check the garbage after their local school lunch and see how much waste there is.
Well, this might make them vomit if it showed-up in their salad ...