Lol 10-11 people is the only way I can see this working without spoilage. Just a single person or even a family of four would have to eat only salads or reduce the number of ingredients in the salad bar too keep it all from going had
It's a professional refrigerated salad bar, so I'd expect the same as you'd find in a restaurant. Maybe prep in the morning and dispose/repurpose into dinner in the evening. Such a cool idea, $1300 is a scary investment but it seems amazing.