Universal availability of business information. New potential customers will find you through Internet searches. Some products will be sold through the Internet, especially to mainlanders who won't be back to Hawaii soon. The cost of a website depends on the size, complexity, and how readily available are graphics and copy. A simple one page site could be done in a couple of hours, depending on its complexity.
Some sites require hundreds of hours, depending, of course, on the needs and demands of the client.
Pointing search engines at your site is a matter of registering it with Lycos, Excite, Hotbot, Yahoo, Webcrawler, Infoseek, and many others. Arts in Paradise Web Design can combine many of these services in one hosting fee.