That having been said, it (like floor cleaning) is not easy work. Personal protection and safety is critical. Slips, trips, and falls are the #1 killer in these jobs
The video talks about de-greasers and gloves but shows the guy wandering around in a pool of degreaser with tennis shoes, no gloves and short sleeves, so im guessing he hasnt had a major accident yet. Degreaser is a base, so it is very slick. It reacts with fats to form soaps, so it only gets slicker. Do not wear keys on slick surfaces, or youll be picking them out of your leg after a fall.
The idea that any of these blue-collar jobs "print money" is laughable. We get overtime, sure, but we can also get canned quickly if we dont agree to take it on. Expect to work nothing but third shift as a floor cleaner. expect guys like me to yell at you when you move a rack or a tool chest and dont put it back exactly where it was before.
To anyone whos thinking of doing this, Scrub your driveway every day for a week and see if its still appealing.