Autofs works with sshfs. I use it for mounting anything over a network. It automounts on demand and disconnects a mount after a period of inactivity.

https://wiki.archlinux.org/title/autofs

Lenovo m900 tiny

They’re small, cheapish, and low power.

This is definitely misleading. It’s a time series chart with arbitrary data points just casually missing.

I use porkbun and ddclient (https://ddclient.net/). Not sure if that helps you or not but there it is