I host around 70-80 docker containers as well as a few vms on Ryzen mini pcs. All clustered with sub 3 minute fail over.

Everything is extremely fast, and the entire cluster is less than 100W w/ 2.5Gbit switches and 10Gbit backend. The cluster, the switches (4), come in at around 100W last I checked. I also have a dual 10Gbit 60TB NAS that's about 55W. I pay roughly double wattage per year, so 100W costs me about $200/yr.