How do you build and stream (to Android) you music collection

As per title, what if one wants to have a paid subscription to the likes of Spotify etc, but also the MP3/FLAV version of those tracks? What's the easiest way?

I know about lidarr but the fact it's album-centric is a bit of a PITA if all you care for are individual tracks of an album.

Also, which are some good Android apps to stream/download your home server collection of MP3s/FLACs?

Thanks!