thought the same as you 3 years ago. so bought a karcher pro one 500quid. 3motors.
i motor failed in 2nd year but remaining 2 suffice. for domestic anyway.
pros
1- safer
2- sometimes u can access where wouldnt be safe otherwise to by ladder or wouldnt be easy.
3- think you can get away charging 5-10quid more as always impresses - even people accross street come accross as they are intrigued and some want it done.
4 - can be much quicker to do
5 - considerably cleaner and less messy.
6 - weed hook is excellent for getting hold off real over grown weeds etc.
cons
1-poles can be heavy and large or awkward houses need to be priced right to be worth while
2- prob cant charge as much as i thought i could (maybe a tv camera thing might up that the perception of value)
3- i hate the cleaning out after every job - i had apurpose made foam filter as it had a paper one as standard (needless to say after 3-5 cleans it was holy and mushy)
4 - when gutters wet and bit sludgy inside can block pipe fairly easy and find myself at times having to unblock half way through a job. (pet hate)
5- not always possible to minipulate even narrow nose into gutter, for tile over hang, and difficult to clear debris under the roof lining that often hangs deep inside the gutter.
6 - from a ladder you can see everything clearly and could prob price job better knowing what your in for.
thats all i can think of for now - hope it helps
