I am truly shocked that anyone wants to skip or stretch maintenance checks. Having owned and run many helicopters ( over 30 now ) I can assure you the best and cheapest maintenance is preventative maintenance. It is way way cheaper in the long run to over maintain a machine, eg a slight vibration from the main rotor for instance can lead to premature wear on other components, let alone the safety and piece of mind. There is no excuse that the machine is in a remote location or it is not cost effective.