I have no doubt that people in many occupations work from RVs. You can even be paid via PayPal.
I edited various Caribbean boating-related magazines and other publications for years. Our work evolved in the early 2000s until the editorial end was done entirely online. The publisher was (still is) a great guy who left the editorial entirely in my hands to manage while he supervised ad sales.
For my main job, the monthly finished product was roughly a 100-page color magazine the size of Time or Newsweek, distributed throughout the Caribbean.
I never met most of the design staff nor 95% of my writer-photographers in person, and some of them lived aboard sailboats. They pitched ideas and emailed articles and photo files to me. I organized the whole enchilada every month and uploaded all the edited pieces to a password-protected FTP site (File Transfer Protocol) for the designers to download.
The designers did their page work, inserted the ads, and I downloaded their proof files to correct. They uploaded the final files to printers - one was in Miami.
I just needed a laptop and Internet connection periodically, and worked from odd places all over the world, including a ship in the middle of the Atlantic Ocean. So an RV is a piece of cake. I didn't need a printer.
I eventually retired from full time editing - obviously work is work even when you control your schedule and workflow. I still write travel articles occasionally, and easily keep in touch with my editor via a 4G or wifi connected iPad as needed. I've worked for her for four years and we've never met in person.