I'm heating my home 24'x60' or 1440 sq. ft., 2 story and not greatly insulated. On a slab in Maine. Not overly efficient. I'm working on tightening it up. I'm also heating 4 greenhouses and have 3 more I'd like to tie into the system. Currently I'm using a CB E-2300 and a Wood Doctor HE10000 with a combined total btu output of about 450k btu's.
$40k is a lot of money to shell out. They actually have not responded to my inquiry yet, so I'm solely going by your estimate. P&M has 2 chip burners, a 500k and a 800k. The comparable 500k btu unit is $31k with bin. Many of the same features, such as network interface. I like that. Just for giggles, the 800k btu unit runs about $80k. Better off to buy two of the 500s and save money. The other option I'm considering is possibly 2 of the CB Maxim pellet boilers at 250k btus each for about $8k each. Figure $20k total. Not sure what their bigger hopper costs?. But Pellets would probably cost more than double what chips would cost. So I have a lot of thoughts running through my head.