I was just thinking about the video of the tour Franklin gave of the joint and he mentioned that their screened in pit room was perpetually 100*F+, and it's pretty well ventilated. This is a much smaller space and it's going to get ridiculously hot with all those metal surfaces.
It might be better to get a double barrel 500 gallon cooker setup with warming boxes over the fireboxes (assuming reverse flow) with a grill in front on one side and a griddle on the other. Then a separate, smaller, commissary trailer/truck with sink, prep, refrigeration, cooktop, storage, etc. Easier to store, park, etc. Just requires multiple tows. Or . . . build the kitchen into the bed of a big truck which also could tow the cooker.
This: https://cruisingkitchens.com/mobile-custom-kitchens/ (apparently this is some sort of TV show).
plus
This: https://catalog.millscale.co/ms/double-500-gallon-smoker-trailer-b2/
Otherwise, flip everything to the outside with walkways, and walls that pull up into awnings.
I don't know. It ain't my money (except for that $20 I donated yesterday).