If I could go back and do it all over again, I might have chosen to be an electrician or an HVAC technician. They always seem to be in demand. That and plumbers but I don't think I would want to do that. I can barely clean a clog in our sink without gagging!
One of my brothers is a mechanic by trade first, and then went into engineering after. It gave him a fantastic background on the reality of things, rather than just the theory of it.
I might be the same. But if getting paid for it, would I be different? :D
I don't know the smells and texture would still be there no matter how much you are getting paid. I do it for my wife because I love her and you would think that would be more motivation than money, but I still gag!