You could consider a couple of those SuperMicro server cases and link one as a JBOD via a SAS card… see things like https://www.servethehome.com/sas-expanders-diy-cheap-low-cost-jbod-enclosures-raid/ I picked up a 12bay CSE-826 with a SAS3 backplane and two 80 Platinum redundant power supplies for $300. I know you’d need a larger one, but eBay is a great place :-)
This is impressive and terrifying as hell… I’m pretty tech savvy and have watched other AI videos, but if you presented this to me as real, I’d totally believe it! Especially I can imagine it being spliced with B roll footage and maybe “real” footage to make it even more believable. I’m floored…