In North America you can cover all inspections, accessory overhauls and replacement of life limited /cycle limited parts for $110.00/hour.
This is applicable to the latest 700D-2 and 600A-3A.
On the 700D-2 if you have a +20C power check you will easily exceed the IGE and OGE performance at altitude of the standard ship with the 1D1.
At altitude you will temp. out but long after the 1D1 has reached the Ng limit.
You will be able to fly 4 hour geo survey mission and land with reserve.
With the right equipment you will be able to take care of the "On condition" engine yourself.
With the very high cost for 1B engine overhauls the LTS600A-3A is the best option available for continued economical operation of the AS350BA.
Support is OK in North America/Australasia but not so good in Europe or South America.