You don't want to have to pay us every time you want to put a news story onto your site and that's why we offer you content management. From a simple "news" facility to a multi-admin site completely generated from a CMS we can offer you the content management system to suit your needs.
If content is only going to change once a year it might be more cost effective to send us the text and let us make the changes, but if changes are to be made once a month then the chances are that a CMS will more than pay for itself over the lifetime of the site.