Steve,
Thanks for that sounds about right, I was looking at around 2.8k for the annual, plus 1.5k for unforseen issues, 2k for insurance, 1k for hangarage, 2.5k over eight years for hoses, 3k for a life extension at the 600hr/15yr point, £33 an hour for the engine and £4 per hr for the prop.
I have heard they can use up to 3ltr of oil an hour but no idea of oil costs and i'm working on £1.50 ltr for fuel at 16 gal/hr.
Please feel free to correct my assumptions