Someone else chime in here, but it might help if you list the equipment you have. A lot of custom installers stick with certain manufacturers due to familiarity of product, synergy of certain brands and just not having to relearn as many products with each product cycle. (For example, one dealer might use Creston, another might use RTI).
add-on:
The reason I say that is because most of the people who do the calibration, setup etc. aren't in the business for just that. 9 times out of 10 the people who are ISF certifed and the like are part of a functioning business that also sells the gear...