Actually, a Milwaukee right angle cordless Drill (model # 3109-24 - puts out 50 ft-lbs) is more than up to the task, and can even hoist a 200# person on a bosun''s chair to the top of the mast. To be sure there is enough juice, I have a second (charged) battery on hand.
If used to raise the mainsail, it will do it several times before needing a recharge. In any event, I usually only raise the main once or twice in a day of sailing. For the jib, and for trimming, I do it all by hand.
Cost of the tool and the winch bit - about $400. I recall seeing electric winches priced at about $2,000 each.
~ Happy sails to you ~ _/) ~