I've worked for salons that are owned by non professionals, I've come across one that was pretty much a disaster cause owner had no idea what she was doing, she was employing hairdressers that didn't speak English (barely), she undercharged and the salon was filthy, her manger had such poor self presentation and etc, in general I was put off it was just not the place to get hair or beauty services.
Although I've also worked for a man that wasn't qualified and owned several businesses in other industries, it was the best salon I've ever come across. He might not have had a clue about hair but he knew his stuff when it came to business.
You could do it, but you need to find reliable and really talented and experienced staff which isn't easy, but if you're wanting to provide the services you need to be fully qualified and good at what you do. Any hairdresser can be self employed, but not all make it, experiencing being on the salon floor is a must even if it's for 1-2 years, I don't believe you can know what you're doing 100% straight out of college because there's more to it than doing a good cut and colour.
I am only speaking from my own experience, i was managing a small salon with two staff that were part timers while I was an apprentice.
Sounds amazing when you think of it but definitely not that amazing when you're on you're feet for 12 days a day.
You really need to think about this because it can fail pretty easily.
I wish you the best
x