I wash all three of my vehicles about once a week. I use a pressure washer at first, then wash with zanio Z-7. then blow the suds off with the pressue washer.
If the car is not really dirty, I omit the Z-7 rub. I can do the whole job in 15 min. I like this method as I remove all the grit and most of the dirt before I touch the car. This seems to eliminate the swirl marks.
BTW - I always dry with a back pack blower. It is fast and quick.
I also use the California Water Blade on my 3 cars- I've had mine for 3 years now, still in perfect condition - I really like how fast I can dry the car off and not having to deal with wet towels for cleanup