Milo
The helicopters would be owned by the operator, in Europe, already paid. The route/customer they'll fly would be the same. Hangar or airport fees the same. Personnel costs should be quite similar (salaries, training,...)
Even with an owned aircraft, its important to charge an internal lease rate for replacement provision. Otherwise, one is confusing revenue with profit. PM me with your email, I have some recent OEM info which will solve your conundrum.