There is now way I would want to try tackling guttering with sods in at 48 ft using a guttervac from the ground.
nor me 
I was at a 3 storey job last week (above a shop front only as the back was clear) using 5 x 2m cf sections to reach into crappy square line guttering. No sods thank god but was just a build up of tile grit and moss and I found that hard enough to do.
Chap comes out from next door and I said your front guttering needs clearing too. Chap replied "it was only done a month ago by a lad using ladders." Well anyway just to confirm to him it needed doing again I whipped along with the guttercam and showed him how bad it was. Again it was full of moss & tile grit so he said "I don't think the other guy did it properly." As I don't like to put down others as sound unprofessional I said "well to be fare it has rained quite heavy since so alot more moss has been washed off the roof." That one was also done whilst I was there.
Lady comes out from another shop in the row and said how much to do ours please. I said "as the gutter run is full of sods as you can see so unfortunately that will have to be a cherry picker job unless you can find someone foolish enough to try doing it by ladders.”
Then the manager comes out from the end triple fronted supermarket and said "Hi is that system strong enough to remove all the weeds growing in our guttering by any chance?" By now you can probably gather what I said to him too.
My point is unless you are 100% positive that you can clear a whole gutter run full of sods 30 ft up with a guttervac from the ground then be warned you are only asking for a lot of pain & grief trying... Been there, done that, got the t-shirt, no more.
48 ft it just plan bonkers if you ask me and they wonder why cf guttervac poles snap