I hope it hasn't come across that I'm sticking up for my system. It's simple and it works very well, but it does involve mounting it on the van. If I put a video up you would be surprised. I think I've said this before but anyone who has seen it in action gives it a show stopper reaction.
To make my or anyone else's system work off the van is a lot more involved. There has to be a guidance system feeding in because a towel feed won't do(you just blew your £150 budget right there), and there would need to be power and control mechanisms so that you did not need to bend down.
Were you to get the product you want in my opinion it's value to your business would be £1,000 plus. It's very like having a hot system, once you have used one you will never ever go back to the old way.
As regards Ian asking about problems from the reel being fixed on the van, I park at the most appropriate angle I can ,open the side door, grab the shoulder harness and pole and walk away. The brush hits the glass in under twenty seconds of my arrival.
Every day I have about five and a half hours to hit a two-er, I'm 53yrs old and overweight so how else am I going to do it? I keep saying that I find the work hard, and I do, so I am prepared to invest in anything that will make the job either easier or quicker -for me-.