Carpenters were professionals back then and worked in wood, a precious commodity. The Bible said that Joseph was a poor man who worked with "hard substances."
As a poor man he probably worked in the limestone mines. They are STILL in operation today in Israel. The area has MANY limestone mines, all still operational.
In fact the Koine Greek word for cousin appears in the NT. If you’re able to read Greek I’ll give you the passage. If not, I’ll walk you through it. Let me know which you’d prefer.