I built this box with cost & power efficiency in mind. Most services have been virtualized on this machine - it has really cut down on a lot of other hardware/electricity costs. Specs:
I purchased this switch in particular for 3 reasons: 1) All ports have PoE capabilities, 2) There are 4 SFP+ ports, and 3) it was under $100. Beyond that, it's largely the same as most L3 switches. At some point I'll make the jump to fiber on the 10G links, but I'm not in any hurry because the DAC copper cables work just fine, considering all the 10G switching is done within the rack itself. One of the biggest gripes that I have about this switch (and lots of enterprise equipment in general), is that you're vendor locked on the types of cables you can use. I wound up getting some molex DACs that worked.
I was hesitant at the high price point about this, but I'm honestly sold now on Mikrotik. I've never had an issue with the hardware since I bought it ~1 year ago, and RouterOS is an amazing tool (though with a bit of a learning curve). Between various projects, I route between 20-30 TiB of data per month, which equates to an average use of ~65-97 Mbps constant load. On top of this I've got several firewall and filter rules (not a ton), and the overall CPU/RAM usage is about 10%. Currently I'm on symmetric gigabit fiber from my ISP, I'd love to go for 10G at some point. Unfortunately, 10G plans are over $200/month so I just can't justify the cost... yet.
This houses my suveillance system, it's not the best option because it doesn't utilize the 3.5" drive bays in the front. At some point when I get something else to put in there I'll put it in its own case. Build specs and more info are well documented here.
Operates as my NAS. This is the 24 bay version of the 846 chassis, not the 36 bay. The operating system running is TrueNAS. My Plex and NextCloud servers run as jails on this box. These are the specs:
The motherboard/cpu combo is reasonably power efficient, but obviously 24x7200RPM drives use up quite a bit of power. At idle it'll pull 240W at the wall.
As far as what's running on the server, the Plex jail is pretty much vanilla, but NextCloud is fairly modified to act as a family photo server
(it works good, it doesn't work great). I'll have to do a more thorough write up on my NextCloud configuration and photos "solution" at some point.
This was the largest size UPS I could get without adding a 20 or 30 amp circuit to my storage space. I wish I had buckled down and gone for it, because my Supermicro 4U PSU complains when connected to such a small UPS. It does backup everything besides the main server, with about 50 minutes of runtime. There is a smaller CyberPower UPS on top of the rack dedicated to just the router and ONT, with about 2 hours of runtime.
I believe one is a 3B+ and the other is a 4B 2GB. Between the two of them, they run PiHole, PiVPN, and the Plex Requests server. They also deal with a couple random things like dealing with SSL certificates and keeping the dynamic DNS updated (though, my home IP address hasn't changed in a year, so it's not a big job).