I'd suggest a cheap laptop/pc with a CD drive in it running logitech Media Server (assuming you need to rip CDs, otherwise a decent NAS like a Synology or QNAP running LMS works well) then install the Chromebridge plugin. A Chromecast audio into your DAC or direct into the hifi as your player. Other than setting up Chromebridge (a slight faff) it works really well and is cheaper even than a Rpi. If you find it all works well, you can then start on the never ending treadmill of better (more expensive) kit. Im assuming you have a wifi router already.