Go for the cheapest, unless MWU-AZ is at all similar to UDM. If the difference in price is relatively small (living expenses included) choose AZ over UDM even if AZ is more expensive. If it's to the tune of 10s of thousands of dollars though, go to the cheaper regardless of the quality difference.
Another thing to keep in mind when comparing is that UDMs estimates assume you live in SW Detroit (where the school is located). This is a ghetto to a degree that most Americans never really experience, and you will not live there. They call it the "Corktown" campus, but most of the Corktown neighborhood is on the other side of an expressway and is not nearly as rough.
Anyway, assume the comfortable cost of living to be a bit higher than the estimate they provide.
No idea about Crighton.