I need to place a winch at the front of a 20' Pace trailer, since this trailer has no side door. Definitely want the cordless controller. It will be used on a coupla other cars in the same weight range, so 4000 lbs would seem like plenty. And does everyone just put a 12 v. battery alongside the winch rather than going to the trouble of getting power from the towing vehicle? The Warn winches seem overkill, since they are deigned to survive 'outdoors'. Cost is a consideration. Thanks, Redeemed