I literally have a Linux machine that I’m ready to rig up were it not for Comcast being my internet provider. Maddening to live in “Silicon Valley” and be dealing with dog shit data caps and speeds.

This does not pay out in Germany due to the high energy costs in private house holds or office spaces.

With 0.40 EUR/kWh, running a beefy 100 Watt NAS setup will cost 0.96 EUR per day.

Yes, around 30 Euro per month. Now add the hardware costs.. And the internet connection costs (partly).. Anti-theft options.. In my opinion it is cheaper and more reliable to rent another dedicated server at another hoster for this. If you are sitting in Germany.

For a "small server/NAS"?