Here in Australia, where everything is expensive, don't pay that for mechanics who travel to a minesite in a vehicle.
Normal labour over here for a vehicle service would be around the $90 to $110 per hour. Not sure what Porsche would charge, but $200 seems way over the top.
What would a Porsche mechanic make in terms of a wage per year? Over here, multiply it by 2.5 and you roughly get a sell price (divided by the hours worked). But we have 6% payroll tax, 9% superannuation, minimum 4 weeks annual leave, 9 days sick leave, long service leave after 10 years, 13 public holidays per year, etc.
$200 makes $80 per hour look fantastic.