Do you own your own centre or are you looking to sponsor a tournament?

If it's the latter, have the centre do the organisation for you. More detail please.

When I mentioned "centre", I meant a futsal centre as I'm assuming you won't be playing outdoors.

If you speak to them, they'll help organise one for you. You'll need their help in getting officials and equipment like bibs, balls, whistles, etc. Also, they'll help you develop a schedule. All you need to do is determine how much you want to give away to the winner.