Barbering can be a surprising lucrative career. Especially men's barbering. Has a particularly high dollar/hour rate too.
Tooling is $1k for clippers and scissors and razors. Not sure about chairs, but probably another $1k.
Suppose you charge $20 a cut, typical cut takes ~15-20 minutes and you're open 360 days a year.
10 cuts/day => $72k/yr. 2-3 hours of work a day.
20 cuts/day => $144k/yr. 4-5 hours of work a day.
Find reasonable rent and you're netting a pretty good profit. And yes it's an easy space to enter, but generally, once men find "their barber", they're locked in for pretty much the rest of their life and become a regular customer every 2-3 weeks.