This brings up an interesting side point. I'm not sure if it's the same everywhere, but in the state I reside there are two sides to the trade professions. One

This brings up an interesting side point. I'm not sure if it's the same everywhere, but in the state I reside there are two sides to the trade professions. One side is the service side. This is typically non-union and employees are trained at vocational schools that specialize in some field of expertise. The other side is the new construction side. This is typically union and employees are trained via schooling and apprenticeships provided by the union itself. In general, the union/new construction side makes more money, but, it's harder to get into the union and you generally work less hours (and make less money) until you are a fairly senior person. The non-union/service side will make more money (and work more hours) at least initially. The service side has very high turnover of youngsters.