All of your questions would be better addressed by the company and not the public, what type of entry fee or cost for parking are you asking? RVs these days come with solar hook up but the panels are purchased separately. Every manufacturer has a different warranty and they carry almost all brands. I'm sure you can purchase an extended warranty through them after your purchase. Not sure how helpful this was but hopefully it helps you a little.
I don't know
No and no... and for the rest, go and ask and look around.
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