A friend of mine has the type of system I would like to put in at some point. He has a small shed about 30 feet from his house with a "basement-style" wood furnace in it (not sure of brand). He has enough room to keep a couple days worth of wood in there if he wants, but it is right beside his wood shed, so it's just a short carry. He also has a backup generator to make sure the circulator keeps working in the event of an outage. It's a pretty big home, and he goes through about 6-7 cords per year.