Esther, we're looking at what is, not what could be. Also, it seems to me that part of the discussion here needs to revolve around the concept of flat-fee versus hourly charges for web design. We're in the midwest, and for new sites charge a flat fee. Sometimes, we will write the contract to include UP TO a certain amount of hours, and if it exceeds that, the charges will increase, but up to a maximum amount. Normally though, we do them on a flat fee basis.
Some customers benefit more from the hourly and some by the monthly plan.
This is an approximate because I've done bids for whole sites 'til now. I'm, generally, as busy as I want to be. But I always thought that i was cheap. I'd never charge that much for what they described. But a standing client is hinting at going to some kind of maintenance agreement.