Unimog Pricing
If you can get a U-500 with crawler gear, almost full hydro package, lifts front and rear (remember no pto on rear of US U-500), etc. for $90K, buy it and resell!! The base price for the U-500 plain-jane is now $95K - with those add-ons, more like $120K right now. I don't think the Ken. dealer is very active so I'd be a little wary of that.
For your application, I think working gears would be more than sufficient. Crawlers (crawler #1 goes 240' per hour) are more for snowblowing or asphalt cutting than anything else. For you app. I don't think the 500 would make sense as it would be too large. You should look at an older mog with rear logging winch and sprag - these are pretty common. The road speed of 70MPH (U-500) won't be there, but with fast axles you may attain 55MPH. This would have a better rear 3pt. setup and the "AG" series would have all the pto's, etc. that you may require. It would also pull one of those loggin trailers with lift that you see behind farm tractors - and use the hydro to power as well. See the attached.
With the 500 - you may wish to look at expanding your operation into other contract services to fully utilize the unit - that is what we've done here.
Happy to help if I can. Gardiner