Guys i just spoke to a company with a 2nd hand wfp system for sale, aan E500DI that is 10 months old
The system contains the Tank, 100m Hose and Hose reel and a 15ft (4.5m) Unger waterfed Pole (Brand New).
To enable you to clean at greater heights an extension can be added to the unger pole to give you an extra 10ft (3.0)m)
£1700 tho seems bit steep??