What about one of the extended stay places?
This one is a bit south of town, and the exterior is cheesy. But the suites look nice enough and it's around $300 a week. With a kitchenette, you can pick up some stuff at the grocery store and save on meals.
http://www.manorsuites.com/
I'm cold natured, and freeze in the AC a lot of the time, but the thought of trying to sleep in a car in an LV parking garage in June makes me break into a sweat.