This contest seems like a good idea but where's the machine coming from and how is it going to be paid for? Looks to me like it would be a contest/raffle.
Maybe participants could buy a spot in the contest (whatever it may be), and then open up the contest. Or just simply have a raffle. Either way I don't know of anywhere or anyone who's going to relinquish a machine just to have a contest for everyone. The machine would have to be paid for somehow. I'd be happy to offer a good price on a machine and even assist in the contest but I can't handle the entire ticket.
Also, with voting, people tend more to vote for people they like, not necessarily the ones who would win the contest. No matter what you do, if the majority here doesn't like you, then you're not going to win no matter what you do. So I think the vote contest wouldn't be a fair contest. A raffle on the other hand would be. That's just my opinion.
If you need my help, just let me know.