You can do this using WordPress > show post excerpts on tour, full posts to members
You'll want to have some customization done and you'll want to do your homework, but a WP-based platform is a big step in the right direction
As a side note, I've previously used a WP front-end and a MAS-powered backend, with the WP template engine providing the layout / some content for the backend as well ? if you've got big plans, you'll want to look at this approach
Learn to work feeds > they're not just good for giving to others, they'll provide easy ways to use your own content throughout your own site
