It would be...4500 lbs max.? IMHO, yes. A 5.3L 1/2 ton would do it, but not on an everyday basis. But it would be logical to use a 3/4 Duramax considering you would be driving a lot for the mobile detailing. You will get better mileage and the vehicle would handle the everyday hauling better. A 6.0 would handle it just as well, but your mileage would suffer over a Duramax.