As I recently went down this road I'll share a bit of how I approached it. First, I use a mesh wifi system which made this possible without re-wiring my house. Second, before going all-in and buying something from Synology or QNAP, I set up an old Mac mini (2010) as a NAS running Asset UPnP. Music files are in WAV format. I settled on the mconnect app for control. A Sonore microRendu provides rendering duties and feeds a Bel Canto mLink USB-SPDIF converter (I prefer the BNC connection of my DAC). The sound quality is superb, as is the convenience. I will likely purchase a "proper" NAS some time in the near future but there's little need right now.
BTW, the microRendu replaced a Bluesound Node 2, which replaced a well-appointed Mac mini (2012) running Amarra Luxe, A+, and HQPlayer.
BTW, the microRendu replaced a Bluesound Node 2, which replaced a well-appointed Mac mini (2012) running Amarra Luxe, A+, and HQPlayer.