I've looked at an electric winch for my trailer, had a few on LRs, Discos etc. I've often wished I had one on the trailer especially after a tricky retrieval up a steep slip when I'm left gasping
BUT, I've had leccy winches fail in the past due to dodgy electrics which only become apparent at the most inconvenient moment. That could be catastrophic & costly if it happened during a tricky recovery. At least with a mechanical hand winch, you can more or less tell just by looking at it if it will work or not. If I went down the electric winch road, I would look at a way of mounting the winch off the winch post & using a snatch block for the (dyneema) rope. That way, I could keep the hand winch mounted on the post for sh1t or bust situations. I'd also look at mounting a separate battery on the trailer for the winch, so it's independent.
All just IMHO & rambling thoughts of course.
PS a 1500lb winch would p155 the job