Good point! I should have said non-native, not third-party. I also use PowerToys on my Windows machines. I find the tools it contains are very helpful on a daily basis.

Windows doesn’t let you do this natively. But you can do this via PowerToys (third-party add-on): https://learn.microsoft.com/en-us/windows/powertoys/power-display

The key here is old hardware. I built a TrueNAS box out of an old Dell Optiplex 990. I got it from a friend for free but you can find one online for well under $200. Later you can upgrade the box bit-by-bit if you care to. I upgraded the case, motherboard, cooler, and power supply over time. It’s been a capable NAS for several years even though it’s using a 2nd gen Intel core i3.