Michael,

I agree with Kyra.  Lots you can do without spending.  So far, I have had the best luck with word of mouth.  (I'm new too.) I am also at home with three small kids and no money to spare!  Take the kids to the park.  Start chatting with anyone you meet there.  Tell them about it.  Chances are, other stay at home parenrs are going to be interested.  This has been my biggest success group so far. (It's a small group... since I just started but I expect it to get bigger!!)  As Kyra said, talk to everyone.  I told my hairdresser about it yesterday.  She was totally interested and wanted a card for her brother as well.  Also thought her husband would be into it.  They haven't watched the movie yet, but that was just yesterday and sounded promising.  "Drop" cards everywhere.  I just posted in another thread about the flyers I put in mailboxes around our block.
It is in this thread: http://talk.ws/index.php?topic=209.0   But might not be up for a while because I'm still under "post moderation".  Good luck!

Angela