When I had a porti I'd say that 2-2.5 hours was about right for me, there's so much to consider though, slow running tap heavily soiled rooms, with a TM you can clean more or less just as fast irrilivant of the soiling, st up is usually quicker but you have water to hand but you do get those days when you have to ask people to move their cars or you can't get on the drive and are double parked on the road, horses for courses, but to answer your question a cleaner doing a good job on 2 carpets is around 2 hours ish and then set up set down.
Shaun