Soooo, the 30amp service...

We are still having issues with our cursed 2022 Winnebago Minnie Travel Trailer. The trailer has 2 a/c units, a microwave/convection oven, and all the regular stuff, refridge, water heater, etc...
Paperwork says the unit can run both a/cs, which we now know, it can not. It can not run 1 a/c and microwave. We are trying our damnedest to not have to upgrade to a 50amp service, so we have tried a few things like all LED lights, 12 volt lights were already LED, Soft Start on both a/cs, converting one of the a/c, the non ducted bedroom unit, it's on it's own circuit, to a exterior female plug that can be run to the Park's electric service. In October, we are in Cottonwood, AZ for an Art Show. At set up, the extension cord for second a/c kept blowing the breaker on the shore pole or pedestal, but it had worked at home. We had an electrician camping next door and he brought out his multimeter and said there was a crossed wire in the trailer, he checked our female plug and said it was wired correctly, and that wiring problem was "on the other side of that"...now how do chase down this wiring issue and could it be the reason the wiring in this trailer is so sketchy? This is one of many issues with this unit, which we bought brand new.