This will make you very rich. If u start out at Magarita on the tutorial you will notice the high price of tobacco. Go to one of the other ports and buy as much tobbaco as you can. (as long as your buying price is less than 900) Then take it back to Margarita and sell it. Keep doing this until you have as mich monry as you want. (Usually in Margarita they will buy it for 1000 per barrel!!!)