Cost of setting timing, on a V8 ??

While it wasn't checking timing, I wanted to check the alternator on my Durango (battery was weak). I've got a slick early 90s Snap On Counsellor II scope that has alternator wave forms. First I had to pull the BMW out of the garage and then move some stuff off the Scope and from in front of it. Then I rolled it out, checked the manual on how to hook it up (it's been a couple of years since I last used it, that was also the first time). Alternator was good.

The point to this story: all of that took me about half an hour. If it had been setting the timing and adjusting the mixture screws on an old car, about 20 minutes. And, I don't do this every day, but I have been at it for about 40 years.