The comparison between a light fixed-wing and a turbine helicopter is totally bogus. A Cessna can be operated pretty much forever, as-is. On a helicopter, all the moving parts have to be replaced on a regular basis. The TT straps have to be replaced every 24 months, no matter what. Has the OP ever priced a set of TT straps, and the cost of replacing them every 24 months, forever? Or the cost of replacing the main and tail rotor blades on a regular basis? A helicopter isn't so much a capital investment as a money pit, requiring regular infusions of large amounts of cash. Any sane owner has to charge a very high rate just to break even.