How to get retweets and favs from specific statuses


I’m developing a web application. Let’s say that, for example, it will have 200 registered users.

I need to collect, from every status of every registered user, every retweet and every fav with the data of the users who made them.

The Rest APIS do not offer this kind of info, and the Site Streams are in closed beta right now… so… any ideas of how could I do it?

Thank you.