Being that it's prime spring break, availablilty will be hard. But we stayed at the Desert Inn and Suites last month. It is right across the street, and was clean and nice (except the elevator situation was really bad, and we had a double stroller so we had no choice to take the stairs) Anyway, our room was $89 a night and had one full bathroom, one half bathroom and 4 queen beds. Can't beat that! For your time frame it will probably be quite a bit more, but probably around your price range of $200.
If you give us some dates, we can check around for you!
Andrea