How can I rent/sell post space to authors?

I’m looking for a plugin(s) that will enable me to rent out or sell backend post editing capabilities to authors, ideally also with post expiration options. Users will only need editing access to the posts content because I will be linking to some default URLs in a software program I’m developing.

At the moment I’m looking into advertising, guest posting and author based plugins and there are a lot of options to filter through. Any suggestions would be great.