For a super basic and quick, (but better than paint whipping machine) wash.
Three quarter fill bucket with 3 splodges of car shampoo and water
Mitt for body and glass
Mitt for wheels only
Hose to rinse your mitt every few passes
Hose to sheet rinse the car at the end
Start at the top, work down. 20 minutes for a quick job. It'll be better than the machine in both finish and damage level, even with just one bucket :scare:
If you can spare 15 further minutes, use proper two bucket method and towel or micro-fibre dry after sheet rinse. Treat her to a quick detailer - wipe on wipe off Daniel-San.
If time pressure is your enemy, I'd wager in most towns this'll be quicker than a drive to see Mr Handjob, get serviced and the drive home