LoL players! Up for Tourney with bubble tea related prizes?

I work at a bubble tea place and we are trying to bring in more business, im thinking about hosting a tournament with around 8+ teams to play in a League of Legends tournament.

• ~25 dollars per team gets you 5 free drink vouchers and entry into the tournament
• single or double elimination
• 1st prize could be 5 10$ rp cards and a trophy or 5 10$ fruitea gift cards.

Let me know what you think, thanks!

Edit: Sorry, the tournament would be orchestrated online!

UPDATE: So a lot of people have actually told me their interest in this and only need about 2 more teams. Within the next week or so i will PM everyone who said they were interested and run this plan by my boss. It would basically be come in at any time before the deadline and sign up, buy your vouchers, then perhaps use your vouchers and such. Then come in again to get your prize.