There is no definitive answer to this question as the cost of sailboats and powerboats can vary greatly depending on a number of factors. However, in general, sailboats are usually cheaper than powerboats. This is because sailboats rely on wind power to move, while powerboats require a gas or diesel engine to run. Sailboats also tend to be smaller and simpler in design than powerboats, which can make them less expensive to build and maintain.