I can't imagine why it would cost any more than .5 or even as much as 1.0 hrs labor. Any more than that for a few runs is indeed crazy. Thats even one of those jobs techs fight over to do, it's alot more fun than oil services and hanging accessories. 
The tuning part is just as painless, it just costs more 'cause you're supposidly paying for some additional expertise. Like Doug said, the new machines practically do it for you anyway, the old heads with lots of experience don't trust them and like to tinker with the numbers themselvs. Ever seen an old timer suspension tech using a state of the art alighnment machine like a Hunter or John Bean?, they still break out the tape measure for lack of trust in technology.
