The guy in the blog is a musician. Most of his income comes from arranging music. He gets files via e-mail, works on them, then returns them via e-mail.

Some jobs are portable. I'm trying to create a portable business by doing marketing for other businesses. The nature of it doesn't require being in one location as long as the internet exists. I have yet to earn a penny because I'm still in the start up phase. I'm optimistic that I'll have some clients and enough regular income by September to make my move.

Some RV residents work for national park services doing seasonal work. Others work at resorts during different seasons. They stay for a few months to earn money and travel the remainder of the time.