One of the reasons I was using RPI5s for the idea that they could be constantly running and access over LAN for monitoring and use.
In terms of closing channels, on myNode the user has Open Channels ...
rpi and other sbc are not that reliable in the long term. short term is great but they tend to fail in the end... the local balance refers to the liquidity beeing on your side of the channel if you close them you get them back on chain in your wallet associated with the LN client