What you're talking of is skilled and state certified blue collar. Many in this area have legal government protections to do this work. There's a whole class o

What you're talking of is skilled and state certified blue collar. Many in this area have legal government protections to do this work. There's a whole class of blue collar under that. Line workers, food prep, factory pickers, non-medical health aide, framers, concrete pourers, roofers... I know when my parents had their current house built, they had a bunch of hispanic people working on the house. When my parents went to take pictures, they beat feet to get out of any photo. My moms pretty sure they said something about INS. But who knows. My parent's didn't care too much that likely "illegal to work peoples" were building their house. It was cheaper than the other options.