I have had the pleasure of 40 plus years in business and having a Gross of $100,000 a year to at one time over $15 million a year.   For me,  the sweet spot, where I made the most money was at about $6 million.  I discovered that as I grew, I had overhead that took away from what was left for me at the end of the month.

The frustration of managing a business with 36 employees was tough and my health was not good. I was always under the stress of making payroll and managing people.

One other thing to consider is an "exit strategy."  If you are young, that might not be an issue.  For me, I have an advertising agency.  Neither of my two sons wants the business and I have no employee interested in purchasing it.  Since my business is my client list, no one wants to give me anything close to what I think it is worth.

Spending time and energy to grow a business that you can't sell or pass along to family may not be a wise decision.

On the other hand, I know many people who have sold their business for a nice chunk of change.