the bear II wrote:
You'd probably be able to work for contractors on new commercial or residential development projects. Might even end up with a place to park on the job site.
I had a friend who was an asphalt paver. He would travel from job site to job site and stay in his RV. He would contact large project contractors in an area he wanted to visit and try to sign on for the duration of a project. He was rarely without work.
This would be my response as well. Thanks for saving me the time to flesh it out. I wouldn't think being a plumber, working on rigs in an RV park would be pleasant or profitable. Way too many campers would think you should really just fix it because you are a good neighbor. And how welcome would you feel in a park after you presented someone with a totally legitimate bill for $300 and then that customer started telling everyone in the park how they got charged $300 to fix a leaky faucet by the resident plumber? At a shop or as a contractor, you don't live with your customers.