[Too Many Projects]

Well, that was a bummer for you. Happy for you that you were able to keep the lot next door to build your new place.
No mention of heat source. If not in the floor, are you considering an indirect, tube heater for the shop area ? I really like them, no air blowing dust, papers around and the tools/objects warm up and hold the heat much better than hot air does. I can hear it run, but it's quieter than a hanging space heater fan.