This question happens every few weeks, and everytime the opinions are different. So I did a summation, based on our last experience in USA.
I counted a smaller RV, 21 - 25 feet, taking off and giving back in LA, high season, 20 days, 2 person, booked via an european agency:
You can get such an RV for 20 days, includes all camping equipment, all insurances, 2000 miles (100 mile a day) for about 4000 Dollar. That makes 200 Dollar/Day.
For that 100 miles you'll need about 7 gallons, a gallon about 3 dollars, makes about 20 Dollar/day,
Campsites cost as average 30 Dollar/day
Since you are self-catering, you buy your food in a supermarket. That will be about 25 Dollar/Person/day, makes 50 Dollar
All in all that makes about 300 Dollar for 2 people in the very high season. Let's say in the low season RV are very less expensive. You can rent it for 50 Dollar/day.
So let's compare it with car/hotel, same high season, pick-up and drop off LA, 20 days:
One of the smaller and cheaper cars will cost about 50 Dollar/day, incl. all insurances.
For gas (the given 100 miles/day) you'll need only 10 Dollar.
Hotel will cost about 200 Dollar/night
A cheap lunch, bought in a supermarket will be 20 Dollar for 2 Person
Diner, without wine/bear cost at least 50 Dollar.
So it counts up to 330 Dollar per day for 2 people.
In the end, traveling via RV is slightly cheaper.
BeateEdited: 1:26 pm, December 30, 2018