Helispeediii, I didn't pluck the figure of £5m out of thin air; it was a best estimate (actually based on an EC135 from Eurocopter's website with an allowance of £750k for equipment) and on the pessimistic side in order to make my point. A flat rate of 5% is probably equivalent to an APR of 10-11%; easily obtainable in a business environment.
what about admin staff premises rates
As I said,
A good approximation for any business in estimating overheads is to double the staffing cost i.e. another £150 to £200 an hour to pay for the running of the ASU.
What do you think overheads are?
OK, I omitted landing fees but many ASUs will not have to pay for these.
If somebody would care to let me know the maintenance schedules and spares costs, I can finish the rest of the costings if you like. Fuel costs are straightforward.
Cheers
Whirls