SR - post#8. You are dead nuts on there, boy. And I can expand on your comments. For 55 years I've had 4WD vehicles with electric winches. Some had pretty fast uptake - some, not so much. One thing in common with all electric winches. HEAT. Hot motors; hot wiring; hot, near boiling batteries. A 10,000# winch pulling near max load will draw 750+ amps.
There is no such thing as an alternator that can keep up with the "draw/demand" that a 10,000# winch demands. The demand is met by using a battery.
750 amp draw is like pulling a telephone pole thru a 2" knot hole. Something will get hot, REALLY HOT & really quick.
I've had batteries explode - I've had the plastic coating on really HD wiring melt right off the wires.
If it were me. 150 feet of 3/8" steel cable and prepare to drag the logs. Hook to the drawbar - it's the part of a tractor that's designed to be used in that manner.
Most electric winches today come with - 80 or 100 or even 120 feet of cable. If the log is too heavy for the tractor to drag - LOOK OUT when you back chain the tractor to a tree and turn on the winch to pull the log. Something has to give ..............