If you don't know anything about web design / technology ... a Mac really isn't going to make you a whiz with no effort.

Has she looked at using something like a google hosted site and using their WYSIWYG editors?

Once you say you want something professional, and if you're serious about professional, that means that you don't do it yourself. You buy a professional template done already for you, or you pay someone else to do it for you.

Does she want something like http://www.letseat.at/ (which is for restaurants); where it is just a simple but professional look?