Where to rent a MacBook Pro Cheap?

I desperately need a MacBook pro that runs on OSX before the 25th on this month. I'm willing to pay 100 dollars or so a month to rent, but I haven't found any reasonable dealers. One site wanted the price of the item as a deposit (if I had that kind of money why the hell am I renting!), and other sites want me to practically pay a fifth of the total price a week (once again, why am I renting!). Im a college student with zero credit, and I'm just trying to do something as simple as have my lifeline (in terms of my schooling) available to me without having to sell my soul or throw down money I just not have.

Does anyone have a credible rental house, that goes by month, and is willing to let me borrow a computer for a reasonable price?