Thanks for the detailed reply, Paul. To put your figures in context, some trainers in England were already charging £20,000 ten years ago, so I think it's fair to say Peter Fahey is not overcharging you.
Presumably what Colm Murphy meant when mentioning his accountancy background is that a lot of trainers only look at running costs and don't take account of the full amount of capital sunk in their land, stables and other assets when assessing their operations.