I have a 1983 F600 dump truck for use on my land. As of right now, it's not street legal, but it will be when I get the lights wired and have it inspected.
It's a real pain in the but when buying used because you have no idea of what's wrong with it, or how bad it's been abused. If I could afford it, I'd go new. I also have a gas engine. It's got plenty of power now that I've rebuilt the engine, so that's not a big issue. I'd like to have diesel just to keep the fuel issue simple. As it is, I have to buy gas in five gallon containers to fuel it. Kind of a pain.
A few things I've learned is that there isn't any need for 4x4. I can get almost anyplace with mine if things are dry. If it's wet and muddy out, I'm not running anything anyway. A few times I've backed off my trackes into soft dirt and couldn't move anymore, so I just dump the load there. It's always close enough anyway. You always drive over the same ground over and over again. I mean hundreds of times, so the roads your using become very hard and compacted. Getting them smooth is very important, but that's tractor work.
It's dusty work. AC would be real nice. I have my windows open and the interior is totaly covered in dust. It doesn't matter if it rained the day before, it will be dusty after a few dozen passes.
I can get six yards on my truck per load. Be careful of claims of any more than that on a single axle truck. The dump beds should say on them someplace how much they hold, but it's pretty standard to have a five yard bed on a single axle dumptruck. Sideboards will give you another yard.
If you have to move material very far, or are moving allot of it, you might want a bigger truck. Originally I was looking at full sized ten wheel dump trucks. I drove a few in the $20,000 range, but they were all junk. Then I reconsidered my needs and went for the smaller truck. I only have 60 acres to mess with and it's heavily wooded. Not allot of room for a full sized dump truck.
When I first got my dump truck, my dad was here. We would take turns on the tractor and the dump truck. One would load, the other would drive. After awhile, we realized that we were wasting all sorts of man hours. One is always waiting around for the other.
It's almost as fast to load it yourself and then drive it yourself. If you have two people, the other can get some other things done besides sitting around waiting for the next go around.
You realy need several trucks to be able to validate having a person sit on a tractor while the truck is off dumping it's load.
Good luck,
Eddie