In air it might weight 1-2 tons. But immersed in water it might not.
Specially if the mooring line is designed with floaters along to be able to make
a floating line or a sinking line. It could be designed to make it neutral buoyancy line,
and the force to pull it up might be much less. Inflatable buoyancy balloons might be
a better choice than a winch.
Just a thought. I might be wrong. To never pull it up is a good idea anyways.
But to able to move things into the high seas is a priority, so you are on the correct path.
In this case the high seas would mean out of EEZ, so more than 200 nautMiles from shore.