You might have better luck looking for proper forums for your questions. As I mentioned in your other post there is a kayaking forum where all they think and dream about all day are kayaks and kayaking. Likewise there are boat building forums, where the majority of the people spend their time talking and dreaming about hand made boats, wooden spars and home made sails.
Here most people spend the day dreaming and talking about boats usually in the larger cruising sizes. You might get someone here to give you a partial answer but will probably end up having to reinvent the wheel. If you find the right forum, you will find people with experience in making a broomstick and a plastic tarp power a watercraft. There a lot of them out there start with this one.
Boat Design Forums