Once again I would like to commend the idea despite my lack of confidence in the parameters of the chart. My interest in pointing out the problems may allow something more functional to evolve. Maybe the first sorting criteria should not be length and price. Could each evaluated vessel receive a 1 through 5 rating as to:
performance, liveaboard space, ocean passage capability, cost per foot, gunkholing ability and ease of maintenance? With such a listing and 1 as best and 5 as least, I would evaluate my own vessel as....
1973 Morgan OI 413 Ketch 41' 4-1-4-1-1-3
I'm sure more thought should be given to the evaluative criteria, but this is a start at refining your plan. Take care and joy, Aythya crew