You have been given much advise here and you are
wise to consider it carefully. If you choose well you can find a small boat that will have all of the elements of building that will be found in a large boat. Remember that a 20 foot boat is not twice as big as a 10 foot boat It is closer to eight times as big because it is twice as long , wide and deep. The lumber dimensions will be larger. The fasteners will be larger. I chose to rebuild a fiberglass hull because I could find the shape I wanted without the need to build a mould.
wise to consider it carefully. If you choose well you can find a small boat that will have all of the elements of building that will be found in a large boat. Remember that a 20 foot boat is not twice as big as a 10 foot boat It is closer to eight times as big because it is twice as long , wide and deep. The lumber dimensions will be larger. The fasteners will be larger. I chose to rebuild a fiberglass hull because I could find the shape I wanted without the need to build a mould.