Furniture making is a great hobby...it has many attractive aspects for an introspective...but I could not recommend it as a career choice.
It is easier than ever to get into the craft now. There has been a profusion of instructional materials and affordable tools that allow any enthusiast a relatively painless introduction to the process. And even for the person who is familiar with the practice the learning can go on and on, wood working is a broad field with great depth should you choose to explore it.
I taught traditional wood working for a number of years, and still do an occasional seminar. I was very fortunate to have learned from great teachers and I enjoy sharing what they have passed to me. And I find that I always learn the most from interacting with students.
Apart from teaching, restoration of antique furniture is probably the most rewarding aspect of my work. I view it as a sort of "green" practice. Much of the furniture made prior to WWII is built in such a way that it can be readily repaired and put back into useful service. Most modern wooden furniture seems to be essentially disposable which I feel is a terrible waste of resources.