I would love to build bows for a living too, but I also have to be realistic financially.
If I cranked out a bow a week and charged $1000 for each one, that's $52K per year gross. Now, subtract the 11% federal excise tax, assume each bow cost $150 in materials, assume I have all the power tools but allow $1000 per year in tool maintenance. I'm now down to $37,480. Since I'd have to pay for my own health insurance at roughly $1200 per month and assume 15% of my income goes to the government in income taxes, I'm now down to $23,080. I'd better get some liability insurance in case one of my bows blows up and hurts someone. If I want to sell any bows, I'll also need to do some advertizing and maintain a web site (no idea what liability insurance and advertising cost). And I'm sure there are some other expenses I'm missing........So I'll keep my day job.
If you're going to specialize in all wood bows, it might be even tougher to make a living at it since that is a very limited market. Just look at Dryad - they specialized in bows of all natural materials, but have now expanded into fiberglass laminated and ILF bows. I'll bet $$ was a big reason for shifting gears.
I know this sounds pretty discouraging, and I hate to belittle your dreams, but I really think the market is pretty saturated these days with custom bowyers and would now be a tough market to break into. I honestly don't know how custom bowyers make a living at it unless they also have a spouse with a good job or they are retired with a good pension and this is a second career. If you do choose this new career path, I wish you the best of luck.