The only preacher I know in the New Testament who worked was Paul. He made tents. Very likely they all did.

There he met a Jew named Aquila, a native of Pontus, who had recently come from Italy with his wife Priscilla, because Claudius had ordered all Jews to leave Rome. Paul went to see them, and because he was a tentmaker as they were, he stayed and worked with them. - Acts 18:2,3)

I think this must have been tough for an academic, intellectual man like Paul. But he gives his reasons here:

For you yourselves know how you ought to imitate us, because we were not idle when we were with you, nor did we eat anyone's bread without paying for it, but with toil and labor we worked night and day, that we might not be a burden to any of you. - 2 thessalonians 3:7,8.