The mini-pcs that people typically recommend use around that at idle, and are much more powerful and have more reliable storage. But if you all you need is a Pi that’s fine of course.

You could also secure what peers inside the tunnel can access, particularly if you plan to give other people access. I.e. only allow only port 443 on a given server using a reverse proxy. It’s not a major threat either way but it would reduce the amount of access if someone gets into your phone/laptop etc.

You might want to open a feature request for one of the active projects. Shiori has a Firefox extension which has “search bookmarks” mode, which is close to what you are asking for, but is missing the remove bookmark feature.

1. Hourly snapshots using btrbk
2. Daily local backup to a NAS, also with btrbk (note: requires btrfs on both sender and receiver systems)
3. I’m currently setting up a remote backup solution using borg to the NAS of a relative

I’d consider paper (physical) backups for essential passwords and keys, but be careful about security.