I dunno. A plumber's overhead includes, tools, supplies, and what can be harder labor than the non-trivial work you've accomplished. Until you are crawling in

I dunno. A plumber's overhead includes, tools, supplies, and what can be harder labor than the non-trivial work you've accomplished. Until you are crawling in nasty crawl spaces replacing 4 inch drain lines or doing the more challenging work of replumbing in 100 year old walls with demanding clients warning you to not ruin their plaster and hexie tiles... I wouldn't discount the challenge, risks, and physical difficulty that plumbers face. They have a standard rate which is higher margin for putting a new wax seal in your toilet bowl. but digging long trenches to fix busted main drain lines to the street is far worse than grabbing a coffee on the way to the Herman Miller Aeron. Depending on where you are, there's also the apprenticeship/licensing process and dealing with the range of niche plumbing areas. There are plenty of basic plumbers, so high competition (you don't just get 40hr/wk starting up). If you get into commercial, then you deal with fairly complex issues and entrenched rackets for middle management to ensure that they get paid more than you. Do you want to be hands on the pipes or a supervisor? Hands on pipes? You better be tough, never get sick, and ready to deal with a lot of shit - literally. You better work.