I agree shops do a good job and yes tires do get expensive I always get a alignment when get new tires I would never try a caster or camber adjustment but a toe in out adjustment is easy and even through not as accurate as laser the jigs get you in the ballpark. Safety is a big thing if you dont know what your doing dont try it. Tire pressure, rotating and balancing tire are a big in keeping tires in good shape trust me when I say that cause once you get cupping or bad wear patterns in tires youll most likely have a issue for the rest of life of that set of tires