After 22 years of shift work, i'm slowly going to make the move and start up wc, have plenty of work lined up, looking at getting a backpack but need some advice as i read that thay hold 25litres and can get through that in 1-3 houses . What else do i need to start using a pole, also would it be an idea just to do the uppers with a pole and the bottoms with a mop and squeegee to make the water go further. How about a tank in the garage to deionise the water, what sort of size and what other equipment is needed. mick