Back in 1984 began a study of First Corinthians
82 Sermons later I finished: 1102 pages later
Hand written I might add.
You do not have to be a big time preacher to study the Word of God.
Even if you have a very small group you need to study just as hard as if you were a pastor of 1000 people.
I have always studied to the max if I am preaching to a small Bible study or a congregation of 100’s