The info you posted doesn't include the property and accommodations, it's only the travel, which of course is higher, the savings overall is in the stay, so you have to compare it to flying AND accommodations, not just flying.

https://www.trianglerv.com/blog/post/how-an-rving-vacation-a...

Tiny homes and RVs have about 7% of the energy Footprint of traditional dwellings: https://beginrv.com/tiny-house-vs-rv/

So if you add all that up, its more eco friendly, affordable, and what we've chosen to do.