I share the concerns about LPG, and find them enough of a concern that I would be unwilling to have it if I can avoid it. Our office is also the coroner's office due to a crazy law here in Washington, and I've seen the aftermath of serious crashes and fires. No thanks.
I would try to set up the system in such a manner that there would be lots of storage capacity, solar panels to get what I can, and do much of the charging etc while running down the road. Also, I plan to have a decent shore connection so that the self contained options is redundant flexibility, not the primary means of operation.
In addition, the A/C is going to be the main consumer of energy. I have no heat tolerance (it's genetic), and my comfort range is far lower than most people's. I also have big dogs, who need to be kept cool, and I don't like the noise and safety problems of open windows. Given this, the incrimental increase related to some appliances is not likely to be a major issue.
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