Just figure on it taking the crew the whole day.
60$ an hour
buy an echo PAS power unit, extend section and a hedge pruner head.
Probably run you $500 total? (just a guess)
and if you don't have a 12' + A-Frame Ladder, buy one.
Make the client buy your PAS for you.
So I'd charge $2000 or a little less for the job.
The PAS wil greatly decrease your time.. so $1600-1700 might be more reasonable.