I have exactly the setup you described, a Raspberry Pi with an 8 TB SSD parked at a friend of mine. It connects to my network via Wireguard automatically and just sits there until one of my hosts running Duplicati starts to sync the encrypted backups to it.
Has been running for 2 years now with no issues.
I know you said no service change but I use this Tidal client which works really well and goes up to 24-bit 192 kHz: https://github.com/Mastermindzh/tidal-hifi
I also download FLACs from Tidal, Deezer or Qobuz. You can find downloaders for them very easily.