>when I sell it very little of what I charge will be for my labor.

No, almost all of it would cover your labor.

What you are describing is winning the lottery, which isn't really useful since it is a rounding error of possible scenarios. A "Having a career is meaningless because you can just win the lotto instead" kind of scenario.

In reality you would be digging for ages in your yard to find a nugget of gold. If you went to a place with gold to dig, you would be a gold miner, and no, it's not easy money, go ask them.