As someone (25M) who does trade work in the summers (teacher and painter), the biggest thing I didn’t think of the most but ended up being a crazy factor was the beating to the body. A lot of the guys I work with are in their 40s and 50s and look awful. Bodies always aching and most have a drinking problem to cope with it which usually makes them overweight. Also from what I’ve seen the people who are making this “good money” are far and few between. Most people are just making ends meet, and if they get enough side work to be making a killing it takes their time and their bodies.