I know this post is a couple years old, but I thought I would respond anyway. I am just getting started and I have a big interest in cut and curl candles. I have slowly been buying supplies and learning everything I can over the past 2 months or so. I'm guessing AS A BUSINESS probably the hardest part with cut and curl is they can't really be mass-produced like other candles. The extra time and labor involved makes it kind of tough. True, you can charge more for this, but then the challenge becomes finding people who are willing to pay for that extra time involved. I'm sure if cut and curl candles could be mass-produced, Yankee would have flooded the market with them years ago.
I would guess the more generic type carved candles would be tough to sell in the quantities you would need to make a viable business. My guess is that if you can somehow personalize the candles, they would do much better. Maybe such as making candles for a school fundraiser in the schools colors, or memorial type candles with embedded photos. And also probably candles cut and curled to specific holiday themes at the right time of year. I am working on a few ideas, but I wouldn't want to put a timetable on anyting since this has been a slow process for me. But I think that you really need to go for a very targeted market, and the more timely you can make your candles, the better. Personalization is probably a big key with these type candles.