Integration between buddypress, classifieds and directory


I'm working on a local, buddypress powered social network, and one of the main features that we want to offer is the classifieds and a directory of professional services. I've checked "Classifieds" and "Directory" plugins and I've also worked with "CustomPress" but I have doubts of how to implement in the best way.

- Plugins should be activated for the network or only on the main site?
- There's no conflict between Directory and Classifieds plugins? I remember that I saw there was a conflict a while ago when I first thought of the project, can I use both of them now, anything I should be aware of?

Also, I'll work with Membership Premium plugin so I can make the classifieds and directory be open to a certain level