He said cheap.
I take that to mean limited budget, not poor quality, but capable of whatever else might be necessary such as database integration and server side scripting which iWeb isn't intended to do.
In my opinion
Rapid Weaver at around $80 USD would be the perfect product, and price point, to test drive
first before stepping up to something like Parkin Pig suggested above. Just so the OP knows, Rapid Weaver is well reviewed, popular and offers code and WYSIWYG views, has easy to install and decent selection of templates, is very intuitive but also an excellent development environment for personal and small to medium sized businesses. Meaning, not enterprise level, and far above consumer grade which is iWeb.
I'm not saying the only choice, or the best, you'll need to test drive and decide that. But I am saying, and I mean it, that Rapid Weaver is certainly full of features at the proper price point which you mentioned here. If it doesn't fit the needs of your company, you will be spending considerably more to save development time and resources which saves you money rather than wasting it on something that can't do the job.
If you're still not sure, tell us what criteria you'll need and we can help you narrow the search at a higher price point.
-jim