With Obama's threat to make electricity more and more expensive for us proletarians, factor those costs into your decision. Also think about what might happen if the electric grid should go down for a prolonged time due to sabotage, attack or ??? The S.W. is naurally a desert and also is in a serious drought. No one knows how long it will last.
Cooling costs in AZ are high, but you'd have to live in a McMansion to incure 800 bucks a month.