So my 20 second research shows the average salary for a plumber is around $50,000, with 90% making under $75,000. I bet more would be willing to be a plumber for the kind of money you mention, but that's not standard.

If you think of people working in the service sector, like fast food, or retail, I don't think most of them would cut it as a mason.

Aside from that anyone who has a way to make similar money another way would probably do so instead, I certainly would.