building pole barns in the sky

all good points except maybe the spray foam. Just got a flier here the other day from pest control company. They said they can not warranty against termites or mold because they can not inspect the wood behind the foam. I have foam in my shop and haven't had any trouble yet but I would rethink it before I did another one. I saw a house being insulated with blown fiberglass in the walls. They had something sticky on it and rolled it flush with the studs. That was the best I have seen. Back to the foam, I asked my installer about it after the fact and he asked me if I was having problems and I told him not yet. He said well the jury is still out on the foam and he would not be putting any more into residents so something must be going on. May be like the chinese sheetrock?