On Saturday the boat would be assembled and the seams fiberglassed. On Sunday the assembled boat would be sanded and painted. The total time required is determined by the time necessary for the glue, fiberglass, and paint to dry between steps and the finish desired. However the actual cost will be determined by the quality of paint and the amount of fiberglass used. We recommend tapeing the seams inside and out.
Some builders choose to glass the entire bottom, some the entire boat.
Please understand that my Jon boat is not USCG certified or rated. I have always had a preference for paddling, rowing and sailing so my experience with motors is very limited. Because of the problem of liability I can not make a recommendation as to motor size. That being said, I have spoken with several individuals who have been in the power boat business for many years. They tell me that the Jon boat should be able to handle a gasoline motor not to exceed 5 HP on the 10' or 8 hp on the 12'.