Managing and maintaining a website is absolutely vital - there are few sites that will work if nothing changes. Most web owners want people to come back regularly, so the content must be updated and changed regularly.

Management and maintenance contracts can vary enormously. I would tailor a package to suit you.

I have arrangements with clients ranging from simple maintenance contracts to turn-key management where the client sends me update information and I do all the rest (so they don't need to concern themselves).

More interesting deals are possible for suitable businesses. E.g. Farming out all aspects of the website to me, then paying for management on a commission basis when work comes in. This minimizes financial risk.