A young man came to wash my windows last year. He had a large wooden folding sign that he put in front of each home he worked on, which said, "I am paying off my college loans by washing windows. I'd like to wash yours. Phone xxx-xxx-xxxx."
When I called him, he came right over and was responsive and personable. He washed all the windows and skylights in my 3100 sf house, inside and out, in three hours, for $300. I've had many window washers, and he did twice as good a job as any of them has ever done, in half the time. (He also charged more--the going rate around here is $200). Then he went over to another house on my street and presumably made another $300. He said he could do 3 or sometimes 4 houses in a day.
His investment was a light truck, ladder, and a bunch of squeegees, sponges, brushes, and soap. Who knows if he really had college loans or not.
I have two graduate degrees and many marketable skills, and I do not make $1200 per day at work. (Neither do I bust my ass like that--give me college any day.)
This guy scored points compared to most people doing menial work like this, because he was personable, reliable, cheerful, appeared anxious to work, spoke my language, showed up on time, looked me in the eye, etc.
There are many other things people do around here: paint house numbers on the curb, clean gutters, paint homes, pick up dog poop, landscape, power wash walks and driveways, etc. Many of the people who do them are flaky, unreliable, do not speak enough English to understand people's instructions or questions, or look like they just got out of prison. A little personality will carry you a long way in even the most menial of businesses.