I never could understand the reason for an electric tongue jack, or maybe I have been lucky on both trailers that I have had.
When mine is hitched to my truck, and I want to take it off, all it takes is one finger with the handle up and I give it a flick, and it spins about three times. I do this until foot touches the ground, and then it just takes a few turns to get it off the ball.
Hitching up is just the opposite. (practically no work at all)
I just bought a new trailer that comes with an electric one, and I am already visualizing the electrical problems that will come along with it.
Jack L