I should have said ''yearly maintennace costs'' rather than ''operating costs''
but I did mentionned that fuel consumption is very different, oil comsumption is minimal
and I agree that I was lucky to get away with 250k US for the 12-year turbine overhaul, as per the original quote.
that must be done by Safran in USA....and it took 3 full month at least
but once up to date with the 12-yar inspection and the turbine overhauled, its worth north of 1 million, which is a relief
yes at 700k US the machine will be in need of some high expense in the near future