Just a quick 2 cents worth- I bought a house last year with a small pole barn, more the size of the garage. The house came with a franklin stove, and when I went to insure the house, the Insurance Company sent me a set of dimensions that the wood burner had to be in order to meet their codes( 3 feet from the wall). I didn't meet the code, so I thought about moving the stove to the "garage". My sister, who is my insurance agent, said that I would not be able to get any coverage if I used a wood burner inside an outbuilding. Maybe just one insurance company's rules? Something to check on possibly?
BTW-I converted the franklin stove to natural gas logs, and everyone is happy! --Kevin