Protective overshoes and a spray bottle are essential, no damaged carpets of accidents with a bucket!!
I charge double to do inside/out.
Just one thing Jon, come and work on one of our contracts, it is a large national company head office with 135 windows on 3rd floor level. I will give you our 42ft pole, sit back in my van and take great delight in watching you cheat as you call it. When you have finished and your arms and back are killing you then tell me your neice can do it?
The system is designed for safety and having been in this industry for 15 years I have seen to many w/c's fall off roofs and ladders, myself included.
Best wishes, Trev