An enviable workspace all around, brother.
I really need the get my ceiling done and insulate the walls in at least half the shop and install the tube heater so I can stand the cold this winter
I was wondering about an efficient means of keeping warm looking at the intact (but naturally drafty) barn and getting sympathetic chills in doing so. Maybe a smaller shop within the shop with 4 walls and a roof? You could use 2 existing barn walls and insulate them so you’d only need another 2 walls and a roof….

Also: put the shop within a shop where it gets the most sun, along the south wall.
What are your plans?