A generator-less motorhome won’t be for everyone. On the other hand, lots of RVers with trailers camp without built-in generators, which shows it’s possible under some circumstances.
I used our Onan a lot less than 90 hours a year. We never ran it while driving to power rooftop A/C, and stayed in campgrounds with full hookups.
We mostly ran it occassinally to power microwave for a few minutes, or to power A/C for an hour or two to keep dogs cool while eating out, hiking, or cycling. These power needs could have been met without a generator.
I’m not suggesting I’d idle engine frequently for A/C, but even if done, it would cost about 1/2 gallon per hour (more or less) while parked, so at 90 hours per year of generator time, fuel savings would be in range of 50 gallons per year. If part of that 90 generator hours is while driving, extra fuel is even less than 50 gallons a year. The extra $150 per year or so in fuel shouldn’t be the deciding factor itself. Other issues are more important (at least to me).
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