All in all the feller on the controls was there for about 4 hours. The hole he dug was about 12 - 15 feet deep and 20 feet wide. It didn't see all that big, but the basement of the house will hold a bit of rubble, and then of course the rest goes in the hole - The hole was filled with wood, so I sparked it up and it got lit faster then you would believe. As a result of course, it burns down to literally no ash whatsoever, and there will be plenty of room for all of the concrete.
We will refill the hole with the soil that was dug out - and viola, hopefully one will not even notice any evidence of our construction project.