i think you should look at the job of an HVAC(heating, ventilation, & air conditioning) Mechanic. Installation or service, they both leave you covered in oil, dust, fiberglass, cobwebs, smelly. in installation, putting up duct work, running gas lines, installing heaters, airconditioner, furnaces, run oil lines, some electrical. you're always in a dirty environment. in service, you're covered in oil, crawl into crawlspaces. both require you to get into tight spaces, carry heavy weight. have to work on a tight deadline, because in the winter, you must have heat and in the summer in the cases of health for some, you must have airconditioning