This appears to be for a unit that goes back to a commisary each night and Potentially Hazzordous Food is not prepped in the unit. I think there's another guide for the good stuff.
If you don't have the trailer yet, expect about 15K to get started. Commercial fridge is over $1k alone.
If I had to do it again I'd have a trailer where I could mount all 3 FE's plus a grill under a roof plus the 16 foot enclosed kitchen.
Here's a link to the Michigan application. It's not as strict as a number of States. http://www.accesskent.com/Health/Hea...PlanReview.pdf