My brother (Mark) builds guitars.
A recently finished instrument:
Mark has built beautiful things all his life: furniture, RC models, kayaks, etc, etc. He has also played guitars all his life, I suppose building guitars was inevitable. Pretty much anything he has ever built has looked "right," but the guitars take it to a whole new level. The two loves of his life joined up into something new.
Mark has begun a second career building guitars, I suspect he is going to do quite well.