Instead of the trolling motor, try "getting a wife", put her on the bow and let her tend the lines. Just think of marraige like an old boat: fun and exciting in the beginning but a lot of maintenance to keep it up!!!
(On second thought, maybe the the troller idea would be cheaper).
To answer your question, It would have to be one hell of a troller to push the bow of a sailing vessel. If you have a very small boat, maybe... but any boat of any size and displacement does not move really easy. Just my thoughts. I will say that my boat on a beam wind takes every ounce of energy I can muster (and often my wifes) to pull over the bow. A friend of mine with a high-end thruster on his taswell cannot get his to move in much more than about 12-15. My boat displaces about 25,000 lbs, I guess, with our junk on it (only 500 lbs without all our junk, HAHA).