I have a couple of TGP's which only have around 5k per day in hits, but they pull in a good amount of money and do not take me any time at all...
Looks like you are at 65% to your galleries, I would raise that if you want your surfer to stay longer.
Also, I do not see any "Bookmark now" link and I also do not see your top logo, when I added the "Bookmark now", the amount of bookmarker increased 10 folds, it may sound stupid to people like us who know how to bookmark a site, but lots of surfer out there will not bookmark you unless they see an obvious link to do so.
As far as buying traffic, it's very difficult to find good one, so I would stay away from that for now.
Hit me up on ICQ or via email, I'll be more than happy to help you
Oh, I forget my last comment: "Never Give Up !!!"