Two 100lb propane tanks off an RV under mounted behind the rear tires. To meet my BTU requirements at low temperatures, I needed two tanks to meet the vaporization rates needed.
280k BTU wide open
Flexible hose from tank valve to 1/2" black pipe. 1/2" black pipe to a Fisher Two Stage RS232BBF ($40). 1/2" black pipe to a tee, one leg 1/2" to on demand water heater, one leg to service appliances. 3/4" pipe from 1/2" once it entered the CAB. 5/8 yellow flex pipe from Home Depot from the 3/4" black pipe to the appliance regulators.
Regulator needs to meet your BTU requirements. The Fisher listed above will flow 350k.
No AC. I wired for it but I'm not sure it will do any good. I have 3000CFM going through the exhaust hood, that's like 4 changes a minute of air. AC will be little more than a little cold air blowing in your face. I may still add one for non-cooking times.
Generator is a 6000w Kipor that actually has died on me. Working on replacements now but will be a EU3000is Honda and a second one if I add AC. Three year commercial warranty is hard to beat.
Started Truck in November. Worked every Saturday and weeknights until I could not feel my feet any more :)
Grilled Mac and Cheese
Italian Melt (Grilled italian cheeses with veggies)
There are a few more items but you get the idea. Not all items available at every service. 3 or 4 mains and three sides.
If venue will be low volume we go with the grilled sandwiches, mob style events will be faster steam table sandwiches like the chicken and pork.