This one here is 30 grand, and that was with the cheapest builder that could be found. 36 by 28, 14 foot ceiling, 12 foot door.
Slab is 5 inch thick with rebar, plastic and rigid insulation under it. That was $6500.
$16,000 for building package. 2x6 studs. Interior vapor barrier and insulation will be around $3000.
Will have 40 grand into it once the insulation and plywood is put on walls and ceiling inside.
It's built a little better than what was need for code around here. Didn't need that many fire stops in the walls and it has an extra top plate.