Seconding Plex / Plexamp if the use case involves streaming remotely. Probably the easiest to get up and running for remote access.
I’m not sure about the capabilities of hosting on a Pi, but it should be straightforward to run a couple different apps in parallel to test and compare features (I’m currently doing exactly that with Plex and Jellyfin)
If you are buying used datacenter drives, larger capacity drives are also likely to be newer, which tips the scales a little more in that direction.