Definitely get the Ball Python Manual first thing - that is what I did when I decided to get some BPs. After reading it, I started lurking on some BP forums to see the answers to frequent questions. And then I bought and read the books by Kevin McCurley and the Barkers.
ALL of my adult / subadult normal females are c.h., plus I have bought a couple of dozen other baby c.h. BPs the last couple of years so that I could get them well started, and offer them to my customers while waiting for my own to mature and reproduce. I have to say that I only ever had 1 baby that had a problem. They have all been healthy, great feeders. But of course, that assumes they are healthy when received. Luckily, they usually come in from Africa in the spring, so they haven't been held too long yet. Because they are so cheap, unfortunately, many wholesalers do not feed or care for them properly. So it is important not to buy them other than the spring, unless it is from somebody who really takes care of them. So I think the c.h. are usually fine (but NOT older, w.c. BPs - too many problems), depending on the care received in North America.
OTOH, knowing the huge numbers, cheap prices, and minimal care, many keepers may not want to participate in this particular trade. I have mixed feelings, because I believe that the trade may give native people an economic reason to perpetuate the BPs and their habitat, instead of selling all for skins, and clearing the land for agriculture.
It is pretty easy to set up the babies. Just line up the tanks or tubs on a shelf or two, and run heat tape of some sort across the back end. Give them a hot spot of around 90F, and cooler up front. They really like a hide box, but check temps INSIDE the box, too. I like cypress mulch because it can be dampened when needed for shedding - aspen molds up easier. They need more humidity than corns to shed.
You might want to start them on f/t. I started mine on live, which is easier. But it is much more difficult to change adults to f/t than it is for babies.
That is the basics, but spend a few dollars on a couple of good books, and lurk on some BP forums (read some of the questions asked and answered over the last few weeks) to see common problems and their solutions.
Good luck!