I have had a central boiler for three winters, i love it, but it uses a lot of wood. Be carefull of the line length of the pipe, but as much money into this as possible.
I put a T in my line ot heat my pool, this was a mistake as despite the connection being in a insulated box, it is a massive energy draw.
I have a maple forest that I am cleaning up and thinning and I love to cut wood...so this helps with the wood volume.
Oh, and my box is rusting a bit...despite teh use of the anti rust powder..
barkeatr