In my opinion, an email newsletter would be fantastic. Jason L Baptiste recently wrote a great article on that(link: http://jasonlbaptiste.com/startups/email-newsletters-are-sti...).

You could target the gamers(focusing on the gamers that play multiplayer games) audience and have website whose target audience you're serving pay you for ads.

I remember there was a discussion on HN mentioning this topic, someone said that you could easily take 300 for a CPM for email newsletters.

Thus, if you do the math you have near 6k from newsletters.

Good luck! :)