Below Radar
I did a CRE/IRRE/OPC course last year and the total cost has worked out to about £7k which includes the groundschool and flight exams VAT, landing fees etc. I did it in piston twins so as to carry on to become qualified to do LST/LPC/OPC/IR renewals/revalidations on a light bizjet - on which I already held CRI. So it would be sigificantly cheaper to do it in a single if no ME examiner qualification was needed.
Whilst I agree with examiners eventually recovering their investment I don't charge for signing SEP revalidations by experience and I keep copies of all the 1119s I send to FCL, and thus send them myself in a batch rather than give to the licence holder to send. That way I know it's been done.
Others may do things differently.
That's their privilege.
Level 400