You could do it over 250 hours but it would be really stretching it and would require a large vehicle, it must have been a hummer or range rover.
Im an average enthusiastic detailer and can take 15-20 hours.
If you think you could spend around 20 odd hours just on the wheels and arch areas, then throw in engine bay, underside, everything you cant see and then the major body parts (including using a microscope) you could take 200-250 hours i expect.