They certainly are easy to replace. Just three bolts I think. The trick is to leave the trailer connected to your truck ball mount. Then you can remove and replace very easy.
I would want at least 3500lb rated model. Mine is still manual crank but the electric ones sure are nice looking units. You see some guys with pocket remotes for them haha... I would at least like the hand-held wired in remote type...
I was moving my trailer the other day getting ready to start checking things out for this season and drug the bottom foot of it - didn't crank it up high enough... Didn't do any damage however... Almost was thinking it would have been great to damage it as then I would get a electric model haha... Might try that trick again in a few days...
Roy Ken