It's a cool rig. One of my favorites from a design standpoint, it that it looks decades more modern than all of the other bread-box coaches.
But Dennis is right.... It's fatal flaw is the Maxxforce. And I think the front-engine noise was a turn-off too. The Maxxforce was Navistar's attempt to meet modern emissions requirements without using DEF, and they did this using high EGR strategy. This made it a bit of a fuel hog, and the EGR strategy causes carbon-fouling problems. Those issues might not be as big of a deal in a motorhome because of the driving cycle. But there's a multitude of other problems with it as well, MANY of those motors have been scrapped long ago. This is the same motor that was used as the Powerstroke from 2008-2010.
https://www.trucknews.com/equipment/navistar-solved-egr-problems/1003063689/