Been looking into this for weeks now and got to the point where I am confusing myself the more I look. Not long started window cleaning, but am serious about it and can really see the advantage of doing it with WFP, but really can't afford £800+ to buy a complete system. What is the cheapest way to get into WFP? happy to buy second hand, I am good at DIY, have access to a welder etc, not scared to build it myself. Any and all advice most welcome, thanks.