Photoprism, running on a Raspberry Pi 4. I’m just running it as a single user, and it’s been working well for that. A couple of notes:

• Video transcoding is a bit iffy on the rpi, but I’m running it under docker and might just move it all to a mini pc at some point
• I don’t have it accessible publicly, but get to it online via Tailscale
• No app, but the Web interface is good.
• I’m currently running it in “read only” mode (mainly out of initial paranoia when trying it out, but it seems fine) so I have syncthing backing up the photos from my phone wirelessly and occasionally do an import of new images in.

I’ve got a very similar setup now. Only recently adopted tailscale and was previously port tunnelling over SSH to access anything on the local network. SSH is still open, and am just waiting a bit to see if theres any cases where I need it before closing that out too.

Short story: If you don’t need stuff open to the general public, just having Tailscale will probably cover you.

Same setup here. I’ve got a really basic script running nightly from cron. B2 is cheap as, and having an encrypted backup that’s versioned is great for piece of mind.

At one point I was away from home and my (little rpi) server wasn’t accessible, but with the restic repo up on B2 I was able to easily find a file I urgently needed remotely. It’s awesome.

Seconding Syncthing! You don’t need a rpi to get started, but it’s fantastic having it around as the always-on node you can use to sync multipe devices without them being online at the same time.