I'm over $10k invested so far and I've made about $700. Lol. I have lots of cues in progress and at different stages, so I know I will eventually make most of my money back, but it never fails, I always end up "needing" something else. More wood, new tools, a new machine, etc. If I were you, I'd start with a Chris High tower Deluxe lathe. His lathes are proven and well tested. There are many guys on here that use his lathes, and after using my friends a while back, I see why. Not all taig lathes are the same, by no stretch of the imagination. The price might seem high, but really, for what it can do, its well worth the money. $5000 should get you started and going. I'm a rookie at this, but I've got enough wood to last me a couple years. Lol.
Joe