How long would it take you to give 24 individual lessons to 20 people?
First off, would you work an 8 hour day?
If so, how many in the morning and afternoon? 8? 12? 16?
In my heyday, I gave 13 on average, 16 on a busy day. Now, I wouldn't dream of it. But 6 in the morning, and 4 in the afternoon, I could do that. 10 a day.
Could you do that?
Then keep reading.