I am building a small 560 sq ft cabin. It consists of a open kitchen/ dining room with living room. This area will be 20x20 and all open. Then a bedroom and bath partitioned off. Also a small mud room. The entire cabin is 20x28. It will be well insulated and tight. Ceilings will start at eight feet and cathedral up. Is a buck 21 to much stove? I looked at " the hobbit ", but seems too small. Ideas?