I have to raise my eyebrows at the cost of being liberated from the power post. Down here, RV campsites are getting out of hand with some unimproved beaches going for $15 U.S per day.
When I was piloting Quicksilver, the object was to find a beautiful palm lined beach and then do the best I could camping out. Solar panels did not exist so running a generator was the hot setup. With no one around masochistic noise limit was the only restriction.
Now Quicksilver is "permanently" ensconced near a beach. The days of free beach loafing are history. Some developed sites near Cancun are getting $100 night.
So leading all this up to an innocent question...
What do thousand dollar batteries buy you?