IMO, find a real shop to do the job.
I'm kinda cheap and I've tried Firestone, Brakes Plus, Peerless tire...... they all SUCK! Pull, horrible tire wear, caster waaay off. They don't know the basics, and at $10hr, I don't expect them to do a good job. Quality costs $$$. Period.
I live in Denver, 3,000,000+ people, hundreds of auto shops, and there is only one shop that actually knows how to do an alignment. Only 1. Kennedy Alignment. Their shop has NO computers, no flashy lights, no printers. They do alignments on everything from Ferrari's to Freightliners, lifted vans to school buses. They never give you a quote, they just tell you, "we'll call when it's done.". I've had vans cost me $150, and some $260, but all have been perfect.
I've p!ssed away a lot of money trying to save a buck. Only to cost me later.