I know that everyone has already told you about using a cheater pipe for leverage, but another tip for you is to pull the hitch out and put it back in so that the hitch and ball are sitting sideways then you can pull up lifting the wrench, you can lift more than you can push! Or you can jump up and down on the wrench or kick it while standing. And then for tightening the ball just put the hitch in sideways again but the opposite way.
If your times as valuable as you’ve said before an extra drop hitch for each hookup is well worth the money. Threads are easy to strip on the balls as well. Much easier to pull a cotter pin and replace the whole hitch, about ten seconds total.
Aww, this young lady works harder than most men! She is pretty strong too as she was moving the whole truck a few times! My shoulders and back hurt from watching though. I hope she gets a back rub from her hubby, she deserves it!