I was told to think of the R-22 as a kind of disposable helicopter. It runs without much maintenance to the 2000 or 2200 hour mark or ten years whichever comes first. Then you need to send it back to the factory or authorized center for complete overhaul.
This works well in remote places am I told. Not so good for an individual like me because I would use up the ten years with only about 600hours flight time.
Each person or company would have a different need as stated by B Sousa.
There is hardly any good, low cost, fully depreciated designs to choose from for a private owner.
I have owned 7 fixed wings and sold them for more than I paid. They appreciated.
That will be hard to do with a helo I think. But the idea of buying a fully depreciated unit does make sense. But the cost to maintain and restore is high.