Hedge Trimming Quote, Whangarei

Hi, I have a hedge that I have been trimming for a while now and my time has become limited, so I'm looking to outsource this activity.  I would like a quote on how much you would charge for a one off trim or 3-4 trims on a 12 month contract.   

The hedge is approx 36 metres in length and can be seen in the photo below.  You are only required to trim the side showing in this photo and the top of the hedge (the next door neighbour does his side).