Mr H
That is only waste no water as the water has gone out throught a back hose but there are bigger units ,I'm more interested in what size motor?
Also have you had a look at the link on the camera what do you think?
Think of each motor giving you 20ft of extra working height. But even at lower heights its nice to know that if you have a really stubborn bit you can call on more power rather than possably needing to change attachments.
The camera in the link is similar to the one I use but you can get them a lot cheaper from Fleabay..... Look under security cameras. The quality is alright for beginning with and to see what needs doing, doesn't need doing or has been done.
I bought a really cheap brush head and removed the bristles and used that as a base for the camera. It doesn't look professional but it does the job. On the camera in the link I would be tempted to leave the base off and find a bracket to fix it to a plastic angle adapter instead.
Regards
Mr H