Phoenix Cruiser has the option of adding the Quigley 4x4 upfit to any rig they sell. That is pretty tempting to me, because it gives one very close to what a truck/TC can do, but a lot more space.
Of course, Tiger Motorhomes has the best solution... but their rigs are just priced through the stratosphere.
I do know that there is definitely a market niche available, so if some RV upfitter took Ford F-350s and F-450s cabs that had 4WD and two alternators, added a class "C" box to it, and sold it at a reasonable price, they would be a hit.
