In theory you could leave the turbo's manifold at al in situ.
You'd have to disconnect the first cat, oil lines, waterlines and vac hoses plus the support struts for the turbos.
It would be pretty damn heavy, for sure ....... so you'd need a mate to help lift the head off with stuff still attached
You could probably leave most of the inlet on too ....
I wouldn't do it this way , but I guess it could be done
FWIW , it took me just over 2hrs to get the turbos off. Although I had the correct tools and didn't encounter any worn nuts/bolts......if you get a rounded nut on one of the more inaccessible exhaust/turbo nuts you could add hours, if not days to the job.
Don't start it without good quality well fitting tools........ oh and wear gloves!