Here in Germany you have to be careful when setting up a homemade radio signal - it might be illegal depending on frequency and transmit power.

I personally prefer a combination of

  duckdns.org
  Beets
  Navidrome
  Audiobookshelf
  Substreamer / DSub 
  PaulWoitaschek/Voice / Audiobookshelf
  Wireguard

You can even make a script do download smart playlists to usb-sticks for kitchen radios without wifi or old car USB.