Surprised that anyone on ARFcom know's where Colfax WA is. Wow.
How people have got them registered in WA State I have no idea, but I have seen some with plates on them. They are a very handy lil vehicle. Our neighbor has one on his farm and I have driven it quite a bit. Here is a rundown of what I think of them.
Pro's
Fits anywhere an ATV does
Weather protection, heater, AC even unlike an ATV
Surprisingly big bed that can fit a lot and holds a decent ammt of weight
True 4x4 with a real manual transmission
Dirt simple to work on, easy access to engine almost like the old FC vans
Decent ride quality
Very tough and reliable
Never checked mpg but it seems to run forever on a couple of gallons
Cons
I'm 6'0" and my knees hit the dash. An inch taller and I couldn't drive it (single cab Suzuki Carry) A van version might be different where you could slide the seat back some. I'm 170 lbs so width isn't a problem but I can't see a larger person being able to fit.
They do top out at 50mph under ideal conditions, however a realistic top speed is 35-40. They accelerate good from 0-25 and then start gasping for breath and acceleration from that point on can be measured with a sundial. Any hills or even gravel roads will slow their progress to a high degree.
Out in the field with the transfer case in low range crawling along, this isn't a problem, but it is very underpowered for most normal road use. I would NOT want to drive one in traffic on a street with a 35 mph speed limit or higher. You would be looking in your mirror constantly to see what is trying to run you over.
All in all, a good choice for the farm or a LOW speed commute (25mph streets) but if you're looking for something to run faster than that, get a Toyota or Nissan small pickup