Update; After chatting to someone from GVS regarding this I've opted for their Predator machine costing over £2,000. Arrived today got lots of jobs lined up so fingers crossed.
I was out delivering leaflets for the election this morning and was looking at the houses gutters. Plenty had plants growing out of them. If the Insurance Industry decides to go down the commercial property route then we could be mighty busy. That route states they need an invoice to say their gutters have been cleared out, before they can buy building insurance. That's what the guy told me when I was clearing out a commercial gutter with my vac. Some property managers need a video of before and after before they pay the bill. Might be wise to invest in the equipment so you are ready to take advantage if it happens.