The cost was beyond fair for the type of accomodation and amenities, but something for future guests to keep in mind is the price of gas at the time of renting/their estimated fuel usage. In Southern California gas prices are currently at record highs, a cost I did not calculate into my initial trip estimate.
Luckily they were equiped with solar panels, but the generator needed to run to use any of the DC wall plugs. The USB outlets worked with just the solar panels, just charged slow.
While i kept the vehicle mostly stationary, runnind the generator used the 91 gas in the tank and keeping it on cost roughly 70-100 a day with gas @ $6+ per gallon.