Garage heaters ?

i'm in process of making addition to my car "shed" enclosed 26 x 36 ft. will be insulated 2 x 4 walls, tin roof. missouri is NOT that awful cold on average. would something like this work and be economical? or should I just do the wood stove deal????? Barrel stove will end up costing a good $100 stove kit, barrels, and flu.?????