Doug this is a great idea but you might want to shop arround on the price. The company I work for did a promo a couple years ago and if I remember right we paid between 6 & 9 cents each for them and all we had to do is present the artwork. As I recall we had to order 5000 of them to get that price and the hotel was happy to get them from us free. Not sure about SP though...
We are about to purchase the machine that makes the cards but it would be later in the year before I would have access to the card maker. What part of the cost is the payment to the South Point?