Get stream of tweets favorited by group of users


#1

I need to get sream of tweets favorited by group of users (i.e. ~1000 users) — as i can get stream of tweets and retweets via Streaming api.
Check lists of 20 favs for each user every N minutes is too expensive. Is any way to do it easier?

One more time: i do not need full list of favs of each tweet, only events “user X from your base faved tweet Y right now”.