Thank you for the diagram. How do you keep the concrete between the boards higher than the rest of it?
Here is a reefer box in New York. So, it is already insulated, but I doubt that I could use the diesel generator for my own purposes and run the A/C unit off A.C. $4,500:
https://www.cassone-used.com/invento...=0&uc=imperial
Here is a 16' truck box in Phoenix for $1,950:
https://www.commercialtrucktrader.co...SON-5001297735
I just wish, of all of the options they show, one included transport, but I am sure people usually have trucks before they purchase boxes.