The electrical work is required (in most instances) to be done by a licensed electrician. It sounds as if the dealer you got the quote from either doesn't have a licensed electrician on staff, or doesn't have an electrician that they use for their installs.
I always give the homeowner the choice of either using their own electrician or the one I have "on call". My electrician supplies me with a flat rate list of what he'll charge for almost any situation that might be encountered in residential HVAC work. If the HO chooses to use their own electrician I discount the quote accordingly.
Use the biggest hammer you like, pounding a square peg into a round hole does not equal a proper fit.