15A is more than you think these days, still probably need more for a full rack but a modern server can draw around 150W under full load these days. Hell, my entire rack at home hangs around ~.3A during normal usage (2x Dell R210 II's, Dell R320, Dell R520, Lenovo SA120 with 4 bays filled, Juniper EX2200-48T, Mikrotik CRS317).

Can I ask you what do you use all those servers for? Looks like a not-so-small office rack config

FreeNAS for media and VM storage on the R320+SA120.

The R520 runs Proxmox and hosts whatever stuff I’m playing with at any given time along with Kubernetes, FreeIPA, Graylog2, probably my mailserver again soon, etc.

One R210 II runs Sophos XG to handle router+security duties, the other runs Windows Server Essentials 2016 for AD and NPS.

The CRS317 switch provides 10Gb networking for storage on a couple of servers, and everything else is connected to the EX2200.

So, $400/mo is overkill power wise. What would the bandwidth bill look like? How much of an up front investment is it to buy 48U worth of hardware? Seems expensive...

I'm spending $375/mo for 8U, 12A, and 300mbit unlimited (3 x 100mbit bonded). The 8U gives me a GBe private network, 120 cores or so, 350GB RAM, and 20TB or so of storage.

The servers cost me $1200-$2200 each and I would buy a new one every quarter until I got to where I am today. I haven't added new hardware for almost 2 years, but its more than capable of handling my workloads (mostly web apps, lots of servers satisfying sql,ldap,etc dependencies). I burst (and failover) to all the clouds today.