What growing actually means for a solo coach
For most solo coaches, growth is not more clients. It is more income from a roster that is already close to full, held by a practice that does not eat the weekend.
A coach with thirty regular clients is already running close to the ceiling of what a single pair of hands can hold. Adding a thirty first client rarely adds proportional income, because the cost in admin, travel and recovery is paid in the same week. The number on the bank statement goes up by one session and the quality of the other thirty quietly goes down.
The coaches who grow well over a long career almost all do it the same way. They raise what each existing hour is worth, they keep clients longer, they spend the hours they have on the work that actually pays, and they let the practice be found by the people best placed to send the next client. Four levers. Nothing else moves the number very much.