Just finished mine, 24 X 24, 10' ceiling, Chip board over insulation, concrete floor. anvil set on a new azobe tie 5' under the concrete, Post vice and old pipe vice on another tie. large bench out of 1/4 plate, blown natural gas forge and coal forge. 25" exhaust fan, 25 lb little giant on isolated slab. grinding and polishing bench set in concrete to absorb vibration. overhead I beam and a 1 tone chain hoist. keg-orator and beer fridge.
the little giant was the last straw for my wife and the shop was a done deal.