Ummm....time is money.
Winterizations are the last run for cash before the winter and why blow one zone when you can safely do 2-3 at the same time.
All joking aside, we only have a very short time frame to complete 2500-2700 customers so we have to hustle. We will not be able to start for a couple weeks because we were still on the mid 80's this past week. Once the temps dump we literally have at times 5-6 weeks before the first hard freeze.