member input to rich content field

Hi
I have a static page which has formatted text, embedded links to documents/pictures stored in media manager. The text/embedded documents etc change over time.
At the moment my only means of changing the page content is to use Wix editor then publish.

Ideally I would want this page content in a rich content field of a collection and provide a member with access to anothe page where the existing content could be viewed, edited then written back to the collection. Is this possible?

Regards Oliver