The choice of aircraft is critical for the task. An aircraft that is financially advantageous to the operator is not necessarily the best aircraft for the job.
The good old S61 - bless its cotton socks - had many advantages:-
1. Large cabin - 35 survivors on one job, room for euipment
2. Slow, large diameter rotor (downwash, hover stability etc)
3. Powerful tailrotor
4. Frugal fuel burn - 1050lb/hour
5. Reliabilty
6. Big cockpit
7. Amphibious
8. Twin wheel main undercarriage and tailwheel - maneouverable
9. Big cargo door
10. Good C of G range - weight on winch etc
11. Good operating range
Can any of the contenders match up?