We were doing research on this for months. Asked same question your asking now.
What we chose was the Champion, 3500W, remote start inverter generator.
We just spent a week boondocking in the great smokey mountains national park with our 50amp, 40+ ft. 5th wheel, that has both a 15k, and 13.5k AC units.
This generator is fantastic! We ran it for a couple hours in the AM (breakfast and get ready for the day) and a couple hours in the PM (dinner, etc) before going to bed. Ran for 3 days before adding fuel, we used a total of 2.5 gal gas for the week.
It's ultra quiet too, at 58db. We sat it under the drivers side locked to the fifth wheel, and had no problems sitting on the passenger side and carrying normal conversation. That's about 8 ft away.
Here is the best part.... it has a key fob to start it, so wife was able to wake up, start gen on her own with the press of a button and not leave the trailer!
It's also parallel capable, so if you have a big rig like ours and want to use both AC units you would have more than enough power at 6.4k.
It has wheels and handle, so easy to move around, but we never moved ours once it was setup.
It also has auto eco mode, so will only run as hard as needed to meet the demands put on it without any intervention from you. It a pure sine wave inverter, so no issues with electronics.
Only thing I had to do was set it up, secure it, and keep gas in it.
Did I mention the price? $ 1100. That's very close to the same price as the Honda.