I lucked into a building that already existed. The township where I live and, at the time, sat on the zoning board, was selling a building where they stored their road equipment. They wanted to unload it because it "rained inside" in the winter. Nobody but me wanted to bid, so I got it cheap. I knew that they heated the building with unvented gas radiant heaters. It wasn't rain. It was condensation. I replaced the radiant heaters with vented gas heaters. No more "rain". 60' x 60' with (3) 12' x 12' doors. The only thing that worried me was the height of my 'C' with an in motion Satellite dish on it. I measured and I had clearance.