Well, first off, consider how many people your venue can hold. Now get as many people as you possibly can to preregister for the competition (it takes 4-6 weeks according to Hasbro inorder for them to process the information.) Give yourself plenty of time to get things set up and cleared.
What should happen is that you send the registration form plus advertising and a list of preregistered players to Hasbro. They then send you a bunch of games in return (1 gme for every 5 or 6 players)
Then after that you send out as many public service announcements, and press releases as possible, get as much coverage for the event as possible.
You could have local businesses sponsor a player or even a table. I participated in a tournament where a business would donate $.01 for every monopoly dollar I earned throughout the tournament. One person managed to assume a total $50,000 between 3 rounds of play.
Hold your event and have as many people as possible come on down to watch it.
Remember that these people need to eat so have some way of providing food for the audience and participants (that could be included in the entrance fee)
and READ THE TOURNAMENT GUIDE PUBLISHED BY HASBRO
http://www.hasbro.com/monopoly/pl/pa...ment_guide.pdf
I'm personally trying to start a small pilot tournament at a local school in Northern New Jersey. If there is anyone willing to help please let me know.