As far as tire prices it is impossible to beat Let it Ride, just off of Carr and colfax. I go through a set of q3's every two weeks and I've called/checked every shop within 50 miles. It's also a great shop for everything else, knowledgable staff that actually cares and wants to help. Peak Performance Powersports is next door, Connor and Sev do good work. I'm not positive about tire changing prices as I change my own. Tell your wife the investment will easily pay for itself.