Thanks, folks.
Fortunately, it's only this extensive and time consuming once -- the first detail of the season. It's actually not too labor intensive, as a little Zaino goes a loong way, and it's easy on, easy off.
After the initial detail of the season, I can do a Z7 wash and quick detail with Z6 topped by Z8 in about an hour, taking my time. If I add another coat or two of Z2Pro, it's about 1½ to 2 hours for a "quick" exterior detail. Thankfully, each successive coat of Z2Pro goes on (and off) much easier than the initial coat.
I enjoy it. Of course, I don't have a life, so...