like steve said,
but if you know someone that has some that they let you borrow for free then not to bad.
even if its for free (we have our own) it would still take longer to load up, set up, set down and return to base than the a big pole or cherry picker.
yer i agree it would take a lot longer, well depends what scaffolding you use,
scaffolding that i have only takes 5-10 minutes to put up to access roof hight, all legs fully adjustable and on locking wheels.
there are some that you cant get access with a pole or ladder,
cherry pickers can be expencive if you are not trained yourself on the use of them, some places want £200 for hire of one and a man.