I'm proably going to look for a international 4700 or a freightliner fl70 cb and chasis and put a lpack on it and a 12 ft dump bed and be done with it. 25995 gvw so anyone can drive it. Should be able to get set up with a decent truck for 25-30k. I just can't see spending 45k on a 550 that will not last as long as a international.
Hell i doubt a 4700 is physically any bigger of a truck then a f550 if the bodies or comparable size.
K think a flat bed with removeable sides or a dump body with fold down size would be ideal. You want something with sides low enough to load with a skid steer easily.