1. How many pages?
2. Straightforward XHTML pages or need backend programming?
3.Who provides images, if any?
4. What about maintainance?
And if you want somethings thats impressive to them, less hassles to you, the install a Wordpress for them, download and modify a theme to make it look like a website(see my website
www.biologyformhtcet.com as an example).
Thats the best you can give to the firm rather than wasting time with WYSIWYG editor.
And before you think about thr money, let us know what services are you going to provide them with.