Thats a great way to put it.
This is what has always been drilled into my head: You are not only being paid for the job, but also your education, experience and tools..
That being said, if you can do the job CORRECTLY in half the time the additional time you are paid is for your know-how of being able to do the job quick and right, or for some variety of uber expensive tool that allows you to do it fast..
When I have a customer bark about being billed an hour for something that took me 10 mins to do I ask them to do it themselves in an hour, or I ask them if they have the thousands of dollars or tools to even begin to do the job.. The tune usually changes, or they don't come back.. And anymore I don't get too upset if those particular few don't come back. Of course not every tech is in the position to do such shenanigans...
I asked one of the experienced techs here. He said he can do them in about 45 min to an hour. He uses the tool on the tensioner and backs the cams together to get the tensioner out.
The reason I asked him, was because he seems to quote the job a lot: more than other techs.
Thats the way to do it. FWIW, I ALWAYS replace the suction jet pump as part of the job. Otherwise it could cause too much CC pressure and cause the gasket to leak prematurely. I also do not use DP300 on the cam adjuster gasket. FIPG works much better.
This is all pretty interesting and enlightening. But i still have hope i'll never have to do one again.