Boat Broker business. If you're all about fun in the sun, consider starting a boat broker business. Business Overview Highly ambitious entrepreneurs with boating experience have the potential to cash in big on the boating boom by starting a boat brokerage service. However, before you get too excited at the prospect of selling boats, you should know that some states require boat brokers to be licensed. At present, though, there are no across-the-board regulations, and each state...