[Motor31]

You connect them to the unit's power cable using adapters like a 50 to 30 hooked into the adapter that connects both Honda units together.

Yes you will not have full 50 amps. You will have a bit more than 30 amps, pretty much like you would have at a campground that only has 30 amps.

That will allow you to run everything including a single AC unit. Units that "require" 50 amps do so because they have a second AC unit or you want to run everything (water heater, fridge) and a washer and drier on 110 volts as well as a single AC unit. By putting the fridge and water heater on propane you drop the 110 volt load significantly.

By choosing what you need on 110 volts you decide the load the generator needs to run.

The Hondas will cost less to buy, cost less to run (fuel) and cost less to maintain than a built in gen set. If they do require service you can still run one unit while getting the other repaired all without having to take the trailer to the shop as well.

If you insist on being able to run 2 AC's (airconditioners) at the same time you do need a larger generator like a 5kw or larger built in unit. Be aware that there will be significant costs involved and the built in set will take up storage space in the rig. I've also not seen one that is as quiet as the Hondas yet.