ZeroTier might suit your use case. It’s super easy to setup.

Not your point, but I actually do recommend torrenting linux ISOs… often much faster than direct downloads from the devs’ websites. ;-)

I’m a huge fan of Ubiquiti APs, and run their Unifi controller on a Raspberry Pi. Sadly, their code is proprietary - but it basically just works.

Maybe see if ‘rclone mount’ solves the problem for ya. Rclone can often be a super handy swiss army knife for stuff like this.

Oh, Brother.

No seriously, buy Brother printers instead and avoid (at least some of) this enshitification.