"I served as an asbestos air monitor - a lonely job, but could be your thing. In my state, it just takes a 40-hour course to get certified + OSHA10. The job involves driving to sites, setting up air pumps, keeping an eye on them, collecting samples, and delivering them to the lab. Half of the job is outdoors, but for interior projects, you can hang around outside as long as you're within the site."
"Machinery/production work, particularly maintenance/engineering, offers good income (~$90k/year), ample leave (10 weeks), medical coverage, and the ability to work from home. Human interaction is limited."