Breakdown for a small single seater near London:
Hangarage £3000 p.a.
Insurance £800 p.a.
Sundry admin and licence fees £200 p.a.
Annual costs about £4000 before flying the thing!
Fuel £8 p.h
VW Engine £1500 for about 1500 hours' useage ie £1 p.h.
Oil/Plugs and general maintenance £2 per hour
One owner flying 50 hours per year = £91 per hour
1/10th ownership flying 100 hours per year = £15 per hour
A realistic figure would be somewhere between these two.