Stable income: Somewhat stable

I’d rate it a 3 out of 5 because while there is a decent baseline of income potential for fitness instructors, it can be unreliable at times due to factors like client retention, seasonal demand, and competition. It’s not a 2 because many instructors do manage to build a consistent client base and income stream, but it’s not a 4 because there are still significant fluctuations and uncertainties that can impact monthly earnings.