Thanks. Yes, it's not enough for there to be a need. You also have to think about how you'll reach prospects. Stylists and salon owners aren't on the computer all day every day and they don't like to take phone calls from salespeople. They're very expensive and/or time-consuming to reach. A solo bootstrapper almost by definition has very little time or money, so salons are a very bad match for the capabilities of solo boostrappers.
Funny, two years ago I built an MVP for the same market/problem with a couple of friends. It helped us understand the problem and was very MVP (3 man weeks of work all in).
We concluded very quickly that the problem is reaching the audience. We did have a strategy, but the impending arrival of babies means that the entire thing was put on ice.
It's tempting to revisit the niche because, at least if our numbers are correct, we have a real chance of being able to reach the niche whilst keeping the CAS manageable.
We have some of the same problem (buyers of our software really want to be out in the kitchen), and have found a lot of leverage building a community of existing owners/managers where they can all share experiences.
So, not sure if there ks a forum for salon owners, but if there's not, that's the first thing I'd look at building. And if there is, well, there's your marketing strategy. (At least a big component of it.)