Honestly I would go get some gaming PC bling (RGB lights etc) and build a 'fake' server room that's just for marketing or show, but not actually used for anythi

Honestly I would go get some gaming PC bling (RGB lights etc) and build a 'fake' server room that's just for marketing or show, but not actually used for anything serious. Whatever makes the silly boss/owner that made the demand happy. At the same time aggressively build out cheaper cloud or proper on-prem server hosting room. Because ultimately what is the lowest cost to run will be pretty boring with high density racks and absolute minimum of power sucking junk like extra lights, etc. I'd be far more concerned about physical security, fire suppression, backup power and cooling than bling factor for a real on-prem datacenter.