Many years ago, I have built a wooden scale model of the schooner ship Bluenose. It was nice and fun but not that easy. When I designed plans for outriggers I realised that a model ship is not that far a real one. I did the same for outriggers.
10 days for making is realy fiction for my models. Working everyday at the rate of 8 hours a day took me 3 weeks, for each of them!!!! They are mounted like a cedar strip canoe while each plank are nailed and glued to ribs and glued together al the way. This process is long since we can’t work more than 2 planks in a while then let the glue dry.
Nose cones are solid wood blocks shaped with a rasp, and sanded.
If I had to sell outriggers, I would consider making a mold, using the same process for making a cedar planked canoe, using brass nails. I would be able to make a pair within few days, thus reducing production cost. But….. will people agree to pay that price, how many people will be enthousiastic enough. This market is very different from nice sailing cruisers where they ask a fortune for parts, sails etc, etc.
But there is an alternative for making outriggers from plywood. See that link below. To me they are easier to build and nice to sail with. For a bigger boat that needs bigger size ‘riggers, it’s possible to make them bigger depending of constructor’s skill.
http://www.storerboatplans.com/Canoebits/canoeoutriggers.html