Well I doubt you can even find a 3 wheeler for that price so a quad would be a real stretch!!

What I use my quad for is as follows:
Hunting - dragging animals, setup up bear baits, hanging stands, getting deep, scouting and shed hunting.
Utility - hauling at the cabin/farm - wood, rocks, sand, garbage, fishing remote areas or ice fishing, etc
Fun - balming around at the cabin/farms with the kids/wife.

The dirt bike just wouldn't cut for me in any of my usage but when I was younger the Fun factor was much more important than much else! Now a days with the quads that is really not a big concern unless your heavy into sand riding where most utility type quads don't fair as well. No they won't keep up with the dirt bike buddies but then again when it is your turn to lead very few will pass you[8D]!

Best of luck finding one or something that works!