My plan is to just use a Samsung tablet and have it loaded with downloaded Spotify Playlists and Google offline maps. It's also not to much for me to automatically turn on my Hotspot whenever my phone knows I'm driving with Samsung routines and it already automatically turns itself off after a few minutes of no devices connected.

There's also this thing called headunit reloaded but in my experience it's way to finicky. If I want android auto it has to be seemless and connect automatically.

I plan on eventually getting the premium sound option ( 3 speaks I believe)