Best "professional" "WEB site" tool out there...

[kitepilot at kitepilot.com]

Hello collective intelligence: 

This is the simple plan:
To make a professional looking WEB site with minimum effort and maximum 
flexibility. 

It is broken down as:
A (sort of) knowledgeable person kick-starts the site and then handles 
maintenance and minor upgrades to monkeys. 

What's the tool out there that will allow a non-technical person to maintain 
most of a WEB site with the least amount of pain?
Thanks!
ET