Just heard about this place.
http://www.jackjunkies.com
You can rent a lift and tools and do the work yourself. I'll admit I've thought about something like this in the past. Some of their rates seem high, especially some tools, but I guess if there's the demand... Looks like they have a wheel/tire mount/balancer for $20/hr. Unfortunately I don't see any mention of an alignment machine. If you know what you're doing, for certain jobs, this could be pretty great. If you don't know what you're doing you can hire someone there...which I'm sure will be expensive. Overall an interesting prospect I'll have to keep in mind for future projects.