Conservatory ladders? Or a big ladder and someone footing, only other thing is to spray with something like tfr with a pump spray / back[pack and long lance then wfp, or a pressure washer and long lance... do the rest off ladders or same way?
upvc cleaning can be good money, its just too much like hard work when ive done it, maybe im a perfectionist but i cant seem to get a good hourly rate, but i was cleaning with upvc creams ladders etc, maybe with the chemical and a pressure washer or similar it would be faster?