When looking at ERAs last year, one of the biggest selling points to me was the bathroom. It was big, but not so much that everything else was reduced to deal with it.
There are a few things I'd add. One would be the above mentioned inverter. Another would be an EMS so if CG voltage got dangerously low, it would shut the 120VAC shore power line down to prevent damage to compressors. Still another would be a solar charging system to help keep batteries topped off.