Earlier quoted context omitted.
Speaking has someone who co-runs a hair salon, those numbers don't make sense. $30K should be a reasonable loan compared to how much a single stylist can make annually (easily $50K, up to six figures if they are any good). Just shopfitting a hair salon costs $10-20K. New or relocating salons do that routinely and will expect to recoup it comfortably in the first year.
Maybe in some high end markets or very high end or speciality salons, but I'm having a very, very hard time seeing an average stylists making 50k, let alone six figures(!!) anywhere I've ever lived. The BLS says that the 2018 median pay is $24,830 per year. https://www.bls.gov/ooh/personal-care-and-service/mobile/bar... FWIW all my peers that I went to high school with who got their cosmetology license 1) did so for…
Also not all stylists work full time because it's a relatively well-paid job. One of the colleagues at the salon I was talking about has worked a 3 day week for years, and another works 2 days a week (but she does have another job).
On your other point about older hairstylists, it's a very physical job where you stand in an awkward pose for long hours. Many retire (or semi-retire into salon ownership and doing occasional special customers) by their 50s.