I also think for a single axle the contractor body is the answer but 13-14' for max length. The only drawback I could think of the contractor body compared to a flatbed would be for carrying sod pallets as they are usually much wider than retaining wall and paver pallets. I like the fold down side as you can haul attachments there and don't have to have a huge trailer. Get a trailer to haul the skid and excavator and put your attachments or supplies in the truck. Too bad you weren't closer as you could try out the Kodiak to see if you liked that type of truck.