I've been watching the R2 development and discussion with great interest.
With a free sample (preferably including case) i offer to build and document a headless / lite version (no GUI), from the existing image (ubuntu mate). I would try to make it both in the form of an image as well as a script.
I've been running self-configured headless rpi, even before that was officially available for download.
Let me know if there's interest.