On the bottom panes i go accross the window side to side underneath the sash before scrubbing the panes individually,i would do all upstairs window`s with a superlite pole.It`s surprising how good these window`s come up with the pole when if half desent condition far better results than doing them by hand,i do a house very similar to that one and out of all the window`s i normally only have a couple of panes on a couple of bays that milk up a bit,like i say i do a house very similar and i charge £180 for outside only.Price it up as if you`ve got to scrim em all that should make you hike the price up to what it should be,charge any less than that and you`ll be the one getting done not them.