site builders suck *Ruud's sweaty BALLS*. Learn HTML or ASP or PHP.
If your going the ASP route, Visual Web Developer is free to download, and is semi-wysiwyg.
~40 hours to learn the stuff decently, another ~1-2 hours/page minimum, 10-15 hours/page maximum.
Better suggestion: Hire a professional. Your website will look ALOT cleaner, will be done in 1/4 of the time, will be easier to upgrade in the future.