I agree that it’s time this was closed and I understand that boboboy’s comments weren’t along the lines of the OP’s question. I do however think that pointing out the issues that are attached to these crayfish has merit. If the OP was not aware of these problems and he did decide to breed them, then it is quite likely he would also end up selling them. If people who are not aware of the problems they present were to buy them as a novelty and then end up sticking them in a local creek or pond when they no longer want to care for them, that is a major problem. Invasive species are a major problem around the world. If these crays weren’t considered a problem, they would not be illegal.
We all have to be responsible in our endeavors. When we consider mass breeding a non-native species, we have to also take into consideration the impact they could have if they are introduced into nature.