We'll have to gain some experience then :)

Especially when the plan is to just run them in a random rented commercial warehouse.

I drive by a large fab most days of the week. A few breweries I like are down the street from a few small boutique fabs. I got to play with some experimental fabs in college. These aren't just some quickly thrown together spaces in any random warehouse.

And it's also ignoring the water manufacturing process, and having the right supply chain to receive and handle these ultra clean discs without introducing lots of gunk into your space.