Going to do some canvassing this week, are two 2 litre ex-coke bottles filled with water enough to start out with as I don't have any customers yet- lack of confidence on my ladder. How do I price? Time myself on own house then charge say £30/hr so if takes 30 mins charge £15? And with my 6 metre ladder which houses do i not bother with because the windows are too difficult to reach? What houses do i look for to ignore?