The entire building is made from sheet metal and steel girders. Minimal wood fixtures. Most if not all could be replaced with cheap metal shelving so fire damage or ignition sources are negligible. Keep in mind this particular building was used to pour molten steel at temps over 2000 degrees! Almost as hot as a stack of Antminers!
I wasn't precise enough. I didn't mean "your equipment damages building" but "building damages your equipment".
That could be fire damage, water damage, dust/residue damage, etc. You are basically repurposing heavy, dirty industry facility into something much more sensitive to the environmental factors.
I have no first hand experience with coin mining facilities, but I do have experience with more conventional temporary computing/data centers. One of our facilities caused equipment damage via horse hair getting sucked into fans and seizing them. That was because the attached building was dual use: in an emergency it was used as a livestock shelter.
Edit: in another location we had equipment failures (this time mostly temporary shorts) caused by copper wire shavings/cuttings embedded in packed dust. The facility was used for wiring harness manufacturing (cutting, crimping, soldering, shaping, shrink-wrapping).
Edit2: on the flip side of the coin: in one another facility the hot-running computer equipment (no air-conditioning) was instrumental in fixing the water/mold damage to the premises.
In general I think you have a good opportunity on your hands. Just research some pitfalls of "brownfield" location before you actually move in. Good luck.