not really wireguard hits ARM CPU’s hard. you can also get n95/n100 mini PC’s as well for around the price of a Orange Pi 5 and use Intel’s awesome encoder for jellyfin.

A cheap 4k Android TV stick is much better or a $100 Intel n100 PC.

just install Cockpit with Debian, and headless is better as the GUI is a security vulnerability

https://cockpit-project.org/

https://www.redhat.com/sysadmin/getting-started-linux-security

The power cost to run some systems 24/7 is like $10-$50+ a year.

Use a old PC with Pfsense, Opnsense, or OpenWRT, as you can buy a MELLANOX CONNECTX-3 for like $25 on ebay, and you can get a Good AP that supports OpenWRT for like $70-$100, and a switch for like $120 that has one 10Gb in and one 10Gb out with 4-8 2.5Gb ports. I do recommended Opnsense then you can have IPS etc. https://docs.opnsense.org/manual/ips.html

is the type of systems to power a house, server, off grid, etc

you can get these or something like it.

https://www.currentconnected.com/product/sk48v100-48v-server-rack-battery/?ref=wp

150-180 watts up to 500 watts+ with my Dev box going full bore.