Figured I would keep this great question alive.... I am going to buy a jeep wrangler.... Preferably with as much rust and holes in it I can find. Weld a mast to the roll cage and sail it around the world. My question is what size sail should I use? Do you think I can keep it afloat with over inflated off road tires alone or should I equip it with pontoons? Please help I am looking to leave next week.