I agree that emotions are what rule even the most logical people. If the wife thinks an RMH is ugly you won't get one. ( In fact, that's the major reason I didn't build one years ago.) I think a successful masonry guy can adapt a masonry only design meant for small spaces and make a good profit without too much difficulty, since the footprint is small. The marketing side of things mentioned in these previous texts is brilliant, but I think it'll also require on-boarding the right talent who has that entrepreneurial spirit. Who knows, maybe if enough local folks get going across the country it'll reach critical mass and go world wide. That's the plan, right?