My ideal "shack" would probably not be what you are looking for.
60 to 75 ft. of tall masted sail boat. Lot's of wood and brass.
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My second choice would be closer to what you're looking for.
A 60x150 pole barn style metal building with 18ft ceilings. On one end, the side that faces the road, a two story living space with windows overlooking my woodshop and garage. Brick on the front side facing the road with commercial style glass and aluminum doors. Maybe some Dry-vit accents. The far back side where my garage would be would need a loft. A place to keep my boating, hunting and camping gear all in one place. I could also put an archery range up there. A little on the diagonal, I'd have a 20 yard shot to practice with. (In my current shop, I can squeeze a 15 Yard shot if I shoot through a doorway between two rooms. Watch your tail in my shop!) In the center I'd need all of the ceiling height I could get. That's where I'd have my woodshop. I'd need a really tall roll-up door there to get my sailboat out when I finished it. A little space for a basketball goal off to the side of the woodshop. Maybe I could separate that area with my material storage. 3600 sqft of living space,,,That's roughly twice what I have now. Even Sandy might be happy with that!,,yeah, right.
Let's see, Geothermal heat and air, Sky lights, sacrifice some floor space to *overkill* insulate the walls and ceiling, maybe floor heat in the shop, an insulated, wood framed sub-floor in the living area, a storm shelter under the floor (partial basement with a concrete ceiling); InspectorD, this is all illegal according to building code and most zoning codes, ain't it?
Tom in KY, big ideas and little bitty pockets.