Totally agree with the advice above. My DH does woodworking as a hobby; so much of our work is in our heads, and he likes making tangible things. It is a money-suck for us, but I have much nicer furniture than I would ever have bought myself. :-)
On the down side, the only people I have seen make money at it treat it like a full-time job -- you go to any craft show, and there's a low-end guy selling pens and cutting boards, and usually a high-end guy selling fine furniture or art pieces. And these guys go from show to show. My DH considered it at one point. But he realized that turning pens at a production level would be far more boring than his day job, and producing fine furniture would require hours and hours of sanding and finishing work (his least-favorite part of the job), and that both options would therefore kill the joy he takes in doing it as his hobby. Plus, you know, his math said he could make more $ working at McDonald's. :-)
On the plus side, though, his comfort with tools and making stuff has definitely created a virtuous cycle in terms of his comfort in tackling a variety of home projects. When we married, the only thing he knew how to do was change light bulbs and break out the 409; now he does all of our basic plumbing, electrical, tiling, drywall fixes, etc., and in fact did two bathrooms on his own (not to mention a gorgeous built-in and coffered ceiling in our dining room). My retirement goal would be that we ultimately build/significantly remodel our own house, with him doing (at least) all the trim and the cabinetry. So, basically, it's a wonderful world to encourage some burgeoning self-sufficiency.