Cause they build pole barns and not metal buildings with slab/foundations
I'm a broke ass and can't afford 30K+ for a building. I got to buy a boat, fix a dock, pour a patio and fish cleaning station, buy a wheeler etc etc... Still researching but 18K for what I need with concrete will work fine. If it blows over insurance will buy a new one.
My parents have one similar and it still looks new and is 20+ years old