Hi All
Fortunately for some and not so much for others, the cost of putting a boat on the water that you build yourself, is largely dependent on where you are in the world.
Buying secondhand is the beginning, for a few things or using what you may already have can ease the blow of the starting cost.
This is a few things that saved me big dollars as far as I'm concerned;
Building the hulls, the hulls are I suppose the main ingredient to the overall boat, and the bare hulls are surprisely cheap to build.
I put everything together myself, I bought new beams and a new mast section and all the fittings and put it all together at home.
A Class Trailer - Ebay $50.00
Rudders were the rod push down type that I had on my mosquito.
Centreboards - when Jim Boyer shut shop, I bought my boards from Jim half price as seconds, one is a little heavier than the other and one had some marks in it.
Mainsail - Bought second hand, only a few years old and very lightly used, it is still almost brand new.
Regards