Another Newbie from Canada

[Budbrother]

Hey folks, a great site already way out of my depth, quick question why gut a perfectly good bus can a person figure out how to spray insulate on existing interior sheet metal frame it with "sound bar" for anchoring wall finishes? Also, "float" floor with plywood then your floor finishes (vinyl, laminate, tile) and spray foam underneath carriage if accessible? Just trying to save labor and leave structural integrity in place? Obviously, this was asked before just looking for the sense of it. You would lose a little headroom but wow the pros look good

Thanks
Robin