Well, it all depends...
I.e. insurance - if you have to insure, so that you can get a replacement helicopter after a crash - that will cost you some money
If you only have to insure third party damages - you can save a lot of money.
I know an operator (with a good maintenance facility), who can buy a helicopter every two to three years from the money saved on insurance, as long, as there isn't a total write off in that time.
(he is running more than one helicopter so)