I would guess air brakes and electrical will be your two nemesis's. Neither are really road serviceable items. You might get really lucky but I think I got one of the better units out there and I still needed 40hrs or so in my shop to get everything what I would consider road worthy. I needed compressed air, air tools, grinders, welders, lathe, mill, drill press, wiring supplies and lots of time.
I have done what you are planning with several HMMWVs but those are like a VW bug to these being a panzer tank.