I am a maintenance tech for a high school and my upper boss doesn't know this answer.
But do you know where there are some sort of training classes that one could take for learning how to sweat copper / electrical / plumbing / drywall / Hvac / and others?
I know it will take more than a few classes to learn this stuff as I've been doing maint for 2 years. But there is still a lot to learn and my job is being stubborn about sending me and my co-worker to classes...
In NY they have BOCES classes that will teach you a variety of trades. Each course was 10-12, 3 hr classes. I took a welding class as I was going to get back into car restoration. They had everything from computers to nursing classes.
Try the local phone book or google ,"Trade Schools".