Labor seems a little high but it depends on access. The condenser should be easy to pull out in the ER. The air handlers maybe harder depending on how much cabinetry needs to come out. I d try to open it all up myself somthe unit is right there. I don't see 16 + hours of labor
I'm sure you don't see it because you have no knowledge of the scope of the project. Have you seen it? Have you assessed the work?
Is the tech going to clean the lines and change to a new refrigerant? Replace the lines? What else is needed?
You comment on things that you have no real knowledge of and that's not helping anyone but your ego.
By the way somewhere, some how someone is going to pay a service provider fairly whether you like it or not.
I cant keep up with the amount of work I seem to be getting lately and I don't shoot low ball to get jobs numbers and try to make it up on changes. I have a simple rate schedule and I always estimate a bit higher ( an hour or two ) because something challenging always presents itself. I know an AC guy in the Daytona area that's very doing the same and we cross paths sometimes laugh about the people pushing for lower cost labor and then complaining about what they get.
Lets take a bit of time to look at costs vs your wishes.
Commercial Vehicle insurance $$$$$
Liability insurance $$$$$
Workers Comp insurance $$$$$
Fuel $$
Inventory of parts $$$
Ordering, receiving and inventory control $$
Labor ( if you have an employee doing the work ) $$$$$
Follow up and warranty $$
Collections $$$
Marina fees ( In Cape Canaveral they average $30 - 50 a day each yard)
What the uninformed customer sees.
A guy in a truck or van $$
brings the gear that magically got in there. FREE
Has everything he needs for the jog in there FREE
Sneaks in the yard to save you $50. FREE