The Decoliner itself wasn't news, but those are the best walk-through videos I've seen, so thanks.
I relaxed half-way through the Leno piece, when he admitted the nose was steel under the paint. I looked at a White 5-th wheel tractor for sale, with the thought of a low-boy tank/catepillar trailer as the foundation of a fold-out cedar cabin. But I ended up with the Clark Cortez instead.
Here's one. It doesn't have the Randy Grubb build (or video) quality [convex glass portholes] but it is a sport/diesel/live-in variant, finished in 2010: