We have a great idea for a narrowcasting platform and possibly a lot of customers for it (always nice to have), but I'm wondering if WordPress can be used as a narrowcasting platform with the help of a custom theme/plugin(s).
It's important that the content rotates, basically it's a slideshow, but some slides have Youtube/locally hosted video as content, others an image while others have a RSS feed or some other form of text.
It also means it has to be a multisite installation, probably with up to 400-1000 subsites... and user groups that are linked to the content. Some content has to run on all screens within that group. Other content has to be only on 1 local screen.
Can this be made with WordPress, maybe some other cms or should it be something that is custom programmed from scratch?