Without a doubt, the home inspection is the buyer's best tool for investigating almost every physical aspect of a home prior to purchase.  For a relatively small investment, the wealth of knowledge gained is invaluable.  Keep in mind that in Arizona, you can cancel a contract for anything other than cosmetic.  You can't say that you don't like the way a certain thing looks, but you can say you would not purchase a home if there are multiple problems that could plague you well into the future.  Make the investment - it will pay off handsomely, if not only for your peace of mind!