Depone
I suspect hours will be the same regardless of which you choose.
Expect 500-600 hours. What's that? Around €35,000 as a professional 737 pilot before paying 40% tax?
just to check but wiki currently are saying
(Rates of income tax Since 1 January 2012, the tax rates apply as follows:
At 20% (the standard rate): the first €32,800, for individuals without dependent children)
adding a few expenses on you will probably end up paying around 15% max for that type of earnings