The hotel Santa Fe is (as it's neighbour "Cheyenne") in the cheapest category. But you can expect more than in most of the "normal" hotels! The rooms are a little smaller than in the other accommodations and there's no minibar or something like that, the restaurants serve fastfood and so on.
Santa Fe is themed after a town in New Mexico (including an UFO!). Guests can use their breakfast-coupons also in "Cheyenne" on the other side of the "Rio Grande" - be sure to try this once (at least!).