Theres no way that can have 6000 gallons of water. Like they've said below, theres a limit on how much weight you can have with a single rear axle. The highest I've seen is a 2000 gallon elpitical tanker. Otherwise anything under 1500 can be a single axle. And that truck is waaaaay too small to have 6000 gallons of water. 750 maybe, 1000 tops. Now, about the truck itself. It looks decent. The cab looks really nice, The pump should be 1 stud in from the rest of the truck. It could also use a hosebed. Other than that, its a good start!