I agree with what @ghettonerdgirl said in terms of web festivals. And I would definitely submit to some local festivals, so that you have the opportunity to attend some festivals at minimal expense. Having said that, I’d strategically pick festivals around the world to submit to, as that will gain greater exposure and attract in new audiences to your series. We recently won Best Documentary at a film festival in Romania, and as a result, have seen a spike in our web traffic coming from Romania.
Also filmmakers don’t go to all the film festivals that their films get accepted into. I was shocked at Vancouver Web Fest when I realized that so many people seemed to think that was the norm. It’s not. Don’t get me wrong, it would be lovely to go to all the festivals you get accepted into, but if you are going to have the time and the finances to be making your future projects, you can’t go to them all, even if your series is going.