Think I just totally shifted gears on heating, think I'm going to invest in a Central Boiler. Trying to figure out where to put a wood furnace (for weekends), how to heat the main area, supply safe heat to the paint area and the cost associated has made it clear that a boiler is the ticket. I will heat our home, heat the hot water in the winter, heat the garage (all 3 areas if I want) plus have tons of flexibility for adding wherever I want down the road. I've been kicking it around for years but it just never added up for me but now with a house and garage to heat I'm seeing the math work out to my benefit. We'll see how this goes but at the moment it's a Central Boiler Edge 550.
The big benefit is I can now heat the paint booth with radiant heat so no moving air other than exhaust.