I know it’s not what you want to hear but he simplest approach (which will also give optimum sound quality) is a NAS drive connected to the same switch as your Streaming DAC, Upsampler or NB.
Both Qnap and Synology (as well as many others) have the ability to run apps such as MinimServer so no additional computer is required and you will be able to use Mosaic to manage both playback and the connected dCS unit/stack.