At a pro glass shop the windshield should be the easiest to go in…

Took my guys about 20 minutes to get my 51 panel windshield installed (2 piece)

The side glass and vent glass is another matter. If your old stuff is still in and THEY have to dismantle and re-install the new parts… then you'd be looking at two to four hours minimum; IF nothing goes wrong like broken screws/bolts/regulators, etc…
There's a lot of cleaning and scraping of old material from channels and glass frames to be done…labor intensive..
I'd remove all the stuff myself and get it all ready for them and save some $$.

I did my side glass myself (first time) and switched to power windows at that time.
Not rocket science, just labor & common sense..took about a day per side.

my 2 cents!
mike