amazing! that sounds pretty much exactly like what I was wanting to do!

I don’t think Auto support is on the server side, more the client. But as far as I know, any Subsonic client that works with Navidrome should work. At least Symfonium does. Its a one time purchase app though. I use Navidrome and find it significantly better than Jellyfin for large music libraries. There’s too much metadata and Jellyfin is slow as heck when I tried to integrate music into my movie server. Set up Wireguard to split VPN back to your home and it’s like having your own Spotify.