Offer to do chores/provide the money yourself. Visit your neighbors and see if the need help with anything. Pan handle. Return aluminum cans for the deposit. Check under vending machines for change. Sell things on ebay.
If it's a matter of using a credit card / paypal, you can get visa gift cards at most banks and use them just like a credit card. Or you can get a money order at 7-11 and mail that to me and I'll email you a key as a special exception.