The hourly rate for maintenance on you aircraft is not what the LAME gets paid. The wage component is only part of the rate
Correct. Firstly, add in PAYG and Superannuation costs. Then add in overheads such as electricity and water or council rates. Then add in non-billable staff such as accounts and stores personnel. Then add in other various costs of doing business, such as premises rent or loan servicing, tool calibration, insurance and vehicle costs to name a few. All these items need to be included in the overall hourly rate the maintenance organisation charges to the customer.
Also, what subscription and full access to maintenance manuals will cost them, as a CASA requirement now? Some companies charge $1800 per year to have full access to the Piper or Cessna range.
Looking at a quote from 2013, subscription costs to the ATP "BPAT Piper Complete Airframe Library Media: Digital W/backup Disc option" costs a little over US$3,600. Library BE4A, which is ATP's big bundle of all piston aricraft airframes and engines, is in excess of US$11,000. This quote is two years old, but I wouldn't expect prices to be less.