Then don't look for a welding job. If you are in the top of the brick-laying field, there will be plenty of consultancy for these new brick-laying machine jobs or with the company that programs the brick-laying strategies.

The point is that you spend the time to truly become an expert in an area, most of the skills will be easily transferrable to an orthogonal position. Dabbling in a bunch of crap on the side doesn't really get you anything except for a false sense of confidence that gets blown away when an interviewer asks you any reasonably hard question about it.