Using the Raspberry Zero in combination with HifiBerry Dac pro isn’t the usual way but it works like charm. You don’t have to worry about cooling compared to a Raspberry pi 4 and you will also save some energy. On software side I’m using volumio. Setup including Wifi can easily be done on a regular Raspberry. You only have to switch the sd card when finished 🙂
Please feel free to download the .stl files here.