Which Electric Tongue Jack to get

I'm 77 years old, our 320 is really, really easy to crank manually.  You may want to pop the cover and put fresh grease on the gears.

@Tross2023 A few months ago Jenn Grover did a video about an Ultra Tow electric tongue jack that she installed on her 320. It has a plug that goes directly in the 7-pin jack on your tow vehicle, so no wiring is needed to be done for the installation. We purchased the 3500LB rated one for our 400 and used it on a long trip, so feel ready to review our experience.
Install was pretty easy. It did require some work from a half-round bastard to get the post to drop in the hole (that's a file, I'm not talking poorly about my spouse). I believe the install in the video had the same issue.
Using the jack, the TV does need to be close to trailer to provide power. While unhitching (for example) this was a bit annoying. Raise the tongue, pull forward a few inches and lower the tongue, then disconnect the electrical connector from the 7-pin. For us, one of my 'things to do' post-trip is to wire the jack to the trailer electrical to bypass this minor inconvenience. 
Ultra Tow does also make a version that wires directly to the trailer. The jack lists through Northern Tool and Amazon for $190. We happened to catch a sale on Amazon and purchased for $160 in early May (a week before we left on our last trip). The 'Amazon version' shipped from Northern Tool, by the way.
Enjoy outfitting and using your T@B to suit your needs!

A month ago I did the "Electric Tongue Jack for Less Than a Buck" mod and it was easy (for me). @Tross2023 do what's best for you.

I second the Electric tongue jack for less than a buck!  Best mod I have done so far. Art