BTC8183 Agreed that the original airframe is very old, - but I'm sure you know that in recent years they were all reworked using much more recent engines and transmissions etc etc. So to all intents & purposes they are much more akin to the EC225. They are now a totally different aircraft from the old SA330.
Accumulation of flight hours will be much less than the commercial variants, but the type of manoeuvres will create more strain I suspect.
I am interested because a member of my family flies in one regularly.
Tigerfish