Getting ready to build a shop- first time in many decades I have done so- perusing this forum for ideas.

In floor heating........oh ya, you got that already!
Oh boy- you have no idea LOL. Another power possibility is DYI geothermal, but I don't think I am in the right spot. I have lava tubes and cracks on my property that go to the very bowels of hell- we lost a bull in there, only way we knew he was in there was a slight whiff of the smell of rotting meat, the hoof marks and fur as he tried not to fall in. They are very unstable as well, a friend tried to find the bottom of it, at 150ft we ran out of rope, and the next day, it shifted and collapsed right where she went in. No more that! Hawaii a crazy place man. A guy on the right part of the "flow" drilled about 100ft down and uses steam power on his farm.