Hi Dave welcome to the forum.
Water fed pole does a great job, and you can reach up to 60ft.
There are places were wfp cannot be used such as over flat roofs sometimes.
I have been using it 2 1/2 yrs now and was a very good move.
But you still need to squeegee door ways and inside windows.
As for a polo you can get a small trolly system that would fit no problem.
Do you use sign langage as my sister in law teaches BSL.
Regards Roy