What an awesome conversion. To bad regular coach builders can't build such a coach, without charging a Million $$ for the same quality. The Good News Bus
Using 2x4 for wall studs and framing has got to make that thing unbelievably heavy. It also seems a shame to go to all that work, but leave the original bus windows. Not only does it look tacky, but it can't provide much insulation. I would bet it is also noisy going down the road.