Unless you want to go the yacht club or sailing club route, sailboats live primarily at three marinas on Lake Lanier: Holiday, Aqualand, and Sunrise Cove. Prices are pretty much the same as Lastlap said (usually includes water but not electricity or dock box), but you need to check with each marina to see which slips are available right now, and go visit those slips to see if they meet your needs. Sunrise Cove has the most sailboats; we have several friends there, but Aqualand (where we are) and Holiday have quite a few as well. PM me if you have specific questions.