What's the point scaling a business with low earning potential?

I own a dance studio, and the max revenue potential is around $300K annually. After overhead ($70K) and payroll (Studio Manager, Co-Director, and a few contractor teachers), with me as the operator and director, the max profit potential is $50K to $80K annually—unless I choose not to hire any employees aside from a few teachers.

The only way to increase revenue and profit is by expanding—either by adding more studio rooms at our current location or opening additional locations. It's just an insane amount of work and responsibility for such a small return, but I don’t know what other business to run. The studio feels like such a limited-opportunity vehicle.

I'm 22 years old and started the studio four years ago while pursuing my bachelor's degree. I’ve had so many opportunities and work experiences in my degree that I ultimately turned down to keep growing my own business instead. Now I’ve built a scalable business that has tripled in enrollment this year, with retention over 90%. I just need to keep selling to leads and growing my team.

But I feel stuck. I feel like I’ve wasted time on the wrong thing. I’ve proven I can do it, but the ceiling is so low. I don't want to sell the studio and then end up in the same spot with a new business.

What do I do?