You're tired of the BS in building so you're thinking of going back into the nuke field. Do you not remember the difference between real work and nuke work? It's the extra five tons of BS. There's a lot less BS in the nuke industry than there was in the nuke Navy, but there's still plenty to go around. Seriously, if going to Panama and fishing is a real option for you, then you probably don't need to be considering doing this for a living.
I had a fellow who worked for me who got a million dollar legal settlement from a wrongful injury claim several years after a temporarily incapacitating automobile accident. It didn't take him long to quit, move to Asheville, and pursue his dream job of producing his own movie [He had a background in community theater]. He went through his money in about a year and a half, sold his movie rights to someone in a better position to finish it, and was back here looking for work. We found him some part time work for a couple of months until he landed a permanent position down at SRS.
I asked him if, in retrospect, he thought he made the right decision. He said absolutely. Once you know how to do something, you can always go back to it, but chasing your dreams is on a whole different level.
Get busy living or get busy dieing.
Good Luck,
MGM