My suggestions is to get started with your projects, see how successful you are, and then determine when/if you need to contact an attorney and a accountant.
I think there are 2 key areas where they can help, 1) writing off expenses around feeders and 2) sales tax implications.
But I wouldn't sweat it until you can show that you can produce and sell chameleons successfully. Don't put the cart before the horse. Ha.
Some species of chameleons are much easier to breed than anyone on this forums wants to admit. Calyptratus and pardalis aren't difficult breeding ventures. They don't costs a lot of money to initially put together(compared to other hobbies or even other reptile projects), they don't take a ton of time(although it's difficult to go on vacation, even for a long weekend, when you have babies to feed), and you can start producing in a year - there's no written rule you have to purchase babies and raise them up. That's just a bit of a chameleonsforum culture kind of thing, same with variety of feeders, vet bills, etc. There's not a lot of room for 'these are all my pets!' attitude in this type of venture. You're going to be your own vet, you're going to feed based on what is most productive financially to raising babies to 3", etc.
But there in lies the rub, they are easy. Calypratus and pardalis breeders have all efficiencies built into these ventures. So ultimately, you'll need all the help you can get from your accountant for a legitimate business venture. You may find that you indeed need to breed your own feeders which may become your everyday chore even moreso than caring for chameleons. Who's ready to breed some crickets !! Yikes. You'll need to make sure you don't sell off all your future breeders b/c you need the money - if you're wondering why pardalis are still retailing for over $100, look no further.
FYI, if I had room(and an extra hand who didn't cost anything - my kids are all under the age of 4, I need a few more years.ha) I would be commercially breeding these 2 species. So I've thought about this a lot, like you. I bred several generations back in late 90s early 2000s. But I'd worry about accountants & lawyers once I proved again to myself that I could produce & sell. If you can't make it work as a hobby, it's going to be tough to turn into a legit business. Start worrying about tax issues when you're wildly successful. !
Regards,
Shea Peterson