The objective proposed by CRAN is a very interesting one. I would love to participate.
Unfortunately, the concerns mentioned by Shawn are very valid. The typical homebuilder/recreationalist lacks the funds, and/or the piloting, construction, and maintenance abilities to be a prospective customer.
Over the decades hundreds, if not thousands, have sought to achieve the same objective and the success rate is a couple of decimal places away from nil. IMHO, the possibility of success can only come about if there have been significant improvements during the ensuing years. Improvements such as; strong reliable lightweight materials, strong reliable lightweight power trains and engines, and last but far from least, significant improvements in rotorcraft aerodynamics.
Please excuse the above negativism, but my philosophy toward business decisions has been to look for the bad. The good can look after itself.
This forum might be an excellent place to initiate the discussions. The two primary considerations are probably;
1) The market for this craft.
2) A consensus as to principal characteristics of the craft.
'Just one persons opinion'