Soliciting thoughts, considering building my own rig.

Another thing to consider is that when you go to sell it, no bank will finance an RV that doesn't have an RVIA sticker. A relative of mine did a beautiful bus conversion a few years back. The coach was actually featured in Motorhome (or possibly Trailer Life), but he had GREAT difficulty selling it. After a couple of years, he ended up trading it for a piece of property.