I'm all old and stuff, so it's been a long time since I had to ask the rents for anything, but if I were you, I would go in asking for a shorter timeframe. Not only is it cheaper overall, but they should be less likely to think that's where you'll be for the next year.
However, if, when they start to set it up, they see how much cheaper it is per month to do a longer timeframe...they may go for it. I know I did.
Also, like Angel said, you can definitely try to sell them on the idea of it being a Disney game.