Can I ask @Jerry_Sobel, why you are averse to adding an inexpensive network renderer to your system ? Adding such a device means you can use any DAC you want, rather than wait for your favourite DAC to become RoonReady.
An example of a currently available RoonReady renderer is the Sonore SonicOrbiter SE.
After Roon 1.2 is released there will be many options for small footprint network endpoints, including Raspberry Pi, BeagleBone Black and CuBox-i (running Linux, although there may be a RoonBridge image released for the Pi). Support for the Chromecast Audio as a network renderer is on the roadmap, but may not be ready for Roon 1.2.