I worked for Pepsi as a mechanic for a few years and they were rotating the consession trailers for sale. I bought one and 'remodeled' it. I got a copy of code and did what I translated it to be. (Mistake) Hand sinks are very important and sinks large enough to submerge the largest item you have are also real important for following code. I had picked up a 4' sandwich station and a bunch of stainless steel counter top material and re did all of the surfaces and changed the counter tops to be more user friendly, added 3 bar sinks, RV type water heater, a propane system, screen cover for the serving window, removable stoves and a exhaust hood. The trailer is 7'6" wide and 14' long and can be towed by a 1/2 ton pick up easily. It took us 2 years to get the design correct and a blue print drawn up for the health department. Now all we need is a good paint job on the outside and we'll have a choice rig. Water is transported in potable water barrels (15 gal each) and the gray water is stored in a portable waste water tote (like the ones for RV's). the waste volume must be 120% of the fresh water volume (code). I will post some pictures after this weekends BBQ contest here in New Mexico. Buy the way, if you don't like the answer that you get from one inspector seek out another one. Albuquerque stated they did not want another mobile food vendor and refused to even see us. Rio Rancho asked what they could do for us as a new business, so Rio Rancho is where we are located.