I really try and get as much stuff done prior to the actual brew day.
On the brew day itself: 4 1/2 hours.
Prior to the brewday:
Add water to HLT and MT, and create water profile.
Start the starter on Thursday night.
Friday night, fill out brewday sheet,
Saturday morning, fire up the hlt and bring to boil. I dont count this as part of the brewday, because I usually do this before I even have coffee.