Possible new 16-20 team fantasy baseball league coming w/ new format

I have contacted several online commissioner services about setting up a league that will have two leagues- one of AL only players and one of NL only players.  This league would possibly have some inter-league games but certainly would have the Nl and AL champions meet in a fantasy World Series to end the season.  The cost may be higher than normal as I have been told some extra programming may be involved in setting up this format.  There possibly would be two separate drafts and, so far, only snake drafts are available.  The scoring format would be head to head and most likely the standard 5 hitting and pitching categories although that might be tweaked some- such as OBP instead of BA.

I would like to see who all is interested in joining and whether they would be interested in the AL, NL or either league component.  Also, as for the cost- I am waiting to get a final answer from one of the sites as they are checking with one of their programmers.  I don't like free leagues because I think a lot of people bail right after the draft.  But I would like to hear back from people interested in joining what they think would be a fair entry fee.  Part of the entry fee could go to recoup the cost of the league and the majority could go to prize money.  If people are only interested in paying a small amount to help recoup the commissioner costs that's fine too.  Just let me know.  I'm thinking somewhere in the area of $20 per team with payouts for each league champion and maybe 1st and 2nd in the playoffs.  But I am open to suggestions. 

If we have enough interest we could also phase in a minor league draft and a blog for off season moves.

For now I'm interested in knowing- who would be interested- just let me know NL, AL or either.  And let me know the dollar amount you would be OK with paying.  I would be willing to pay up to half the commissioner fees this first year.

Thanks