You might or might not find this helpful.
Some to many people here on this forum don't use their generator three times in five years.
With the slightest bit of alternate planning you'd be on that long trip today.
As a plan, to serve us and no other reason, we have an inverter.
My generator uses half a gallon and hour and my v10 at idle uses 3/5 of a gallon.
You own that rv now.
Whatever is wrong with the generator is not common.
Learn to plan for uncommon or sell the rv.
RV is advertised as a lifestyle.
Lifestyle requires life adjustments.
Good luck with your repairs.
If the dealer is backed up or being obnoxious decide if paying an Independant $200 is worth the salvage of your time.
If ANYTHING was the biggest regret of ANYTHING in our lives it would be gone.
Be it basement dwelling failed to start only child, or a monetary loss on something we're not happy with.
Be happy with the rv, or be happy without the rv.
But be happy.
Deep breath... Resell it, resolve it, or resign to it.
Those are the only three choices.