You can start an a/c with a small generator by using this device:
Micro-air soft startI am not an "expert" on Mexico, central, and South America travel.
There are reports of issues with trucks like a F350 being admitted to Mexico. Something around the interpetation of "cargo carrying capacity" vs "gross vehicle weight."
Perhaps others with actual experience will post...
If you are looking to use an older truck than the one in your profile and travel the out of the way roads something like an Alaskan on a gasohol engine 4x4 truck make common in the Americas with flatbed and side storage boxes. Mod the camper and outside gen compartment so you open an access door inside the camper and give the rope a pull. Gas in a Honda remote tank kit. Run many hours. Same fuel for truck and gen.
