Unfortunately plumbers get a bad reputation for very silly reasons, like the infamous plumbers crack, but it's a noble, necessary, and respectable position that shouldn't be looked down on at all. While a master plumber will make a minimum of $50,000, many will make up to $90,000-100,000 yearly.
There's been a general shift away from blue collar skilled labor ever since the seventies. This is a shame considering those jobs are not only necessary for a thriving society, they also pay very well, allowing even those without degrees to make a living. Speaking of degrees, there's a great argument for entering the workforce and learning a skill opposed to incurring massive debt. Plumbing is a great example of this. That's not to say that everyone who goes to college incurs massive, crippling debt, or that they won't find a job to compensate for that, but it is still something to consider when plotting out your life path.