Hi Shawn,
If you look at all the recent flaming wrecks of Very Light Jet companies, they all significantly underestimated the time and cost of certification. One of my colleagues has stated that if you want a VLJ certified, you'd better plan on having close to $1 billion available.
This may be of interest if you, or others, do not know of it;
"JAR-VLR:- Joint Aviation Authorities - Very Light Rotorcraft
Airworthiness requirements for the certification of very light rotorcraft with maximum certified take-off weights not exceeding 600 kg."
"However, there is a proposed JAR VLR NPA 2, which will raise the limit to 750 kg to be consistent with the proposed lower limit in the ICAO Standard for small aeroplanes in new Part V, A.1.2."
Perhaps times are a changing (in Europe).
This may be the reason for the talk about Robinson stopping production of the R-22.
Dave