When buying be aware. I'll pick at the prior Newell link which is a quality coach. New Aguahot could be $9,000. 20KW gen suggests an all electric rig. Note a 50A plug is 12KW. You might need the gen at a 50A site and will definitely need it boon docking. Get 4 slides or full wall for full timing. But at $99K it might be fantastic and 138K miles is not a lot.
I have no direct experience with it's engine but I would think long and hard before buying a Detroit 60. Ditto for Cat which is no longer offered for road vehicles.