This is a great example of how the homelab bottomless pit becomes normalized.

Rewiring the house for 240V supply and spending $400+500 to refurbish a second-hand UPS to keep the 2500W rack running for 15 minutes?

And then there's the electricity costs of running a 2.5kW load, and then cooling costs associated with getting that much heat out of the house constantly. That's like a space heater and a half running constantly.