You both speak of the deeper problems. And perhaps other coaches can add to your thoughts.
From a peddling-your-service point of view, what obstacles did you guys encounter?
Did you have a hard time attracting enough paying clients? If so, why do you think this was so? Was it because you didn't have a way to reach interested tennis players or perhaps there weren't enough players who were interested? Or there were tons of coaches in your place and a few players?