Two words - Arafura Cadet -!!!
Little brother to the Arrow, home made ply hulls from plans available from the Arrow association, 11' long, (I think from memory 6’ wide), sloop rigged, goes like the clappers, takes an unbelievable hiding and just lasts and last forever, has been a successful class for over 40 years (they have had "national titles" every year in conjunction with the Arrows) and has just recently started to grow in numbers again, is commonly roof racked and stored tied up under the roof of a garage or shed. Seems to me that you are trying to reinvent the wheel? Sailed one up by an adult or by two juniors, and CHEAP.