A tree removal?
It would be extremely unusual to use a helicopter to remove one tree unless the client had some very deep pockets.
I sub'd to an old logging family outfit in Lake Arrowhead that logged with helicopters on some very steep terrain off the main highway between Arrowhead and Big Bear.
It only pays off on a volume of trees removed basis, and you have to have a landing/yarding area to drop the logs off and yard them onto the logging trucks in a high volume rate.
Daily rates for a helicopter capable of this type of logging are 25-35K per day depending on lifting capacity.
To make it pay the operation has to be perfectly timed to keep the copters moving back and forth between the pickup and dropoff points in an almost nonstop fashion (fuel). Today's helo logging copters utilise automatic pickup and dropoff cable hooks, and the crew setting up the pickup point chokers find themselves under alot of pressure to keep up with the volume of logs being moved by working long hectic hours of overtime.
But when done right, the teamwork between the separate feller, choker, aerial and yarding crews is a beautiful ballet to behold, and if done right can payoff very well for the contractors with the experience to pull it off.
Usually it's a state or federal contract with limited access or special environmental concerns that call for helo logging.
jomoco