Thank you cwsqbm for the explanation. That makes sense. Now I know that I will have to look a little further.
To AeroNautiCal, thanks for pointing out one of the three names in the title of the Forum. Since it implied that there were others, I expected that, maybe, there would be a bit more to it. From the title: "Big" led me to believe they would be big (6x6 or Unimog/MAN/Tatra based, not a pickup); "Custom" led me to believe they would be, well, custom. Kind of like the one at the top of this page.
Don't get me wrong, I would love an EarthRoamer, especially one of the new ones that they are basing on the F-650. But they are to campers what Ferraries are to cars - limited number,high end (but still production), campers. There isn't a lot of variance between them, somewhat like the platform they are built on. Once you have seen a Ford Super Duty, there isn't a lot that will suprise you from one to the next, unless you see one that is "custom"ized. 12 pages of "I saw one", got me to wonder where were the custom, one off, back yard creations that show the capabilities and creativity of those who build, or at least modify their rigs to do the kind of camping that "expedition" implies. At least GEV and Unicat have a few different offerings on a bunch of different platforms, and believe me, as soon as I win the lottery, I will be giving all of them a call - including ER. Which one I end up with, well you will have to watch this site to see. Hopefully sooner rather than later.