i don't know much about crabs either, but just from looking at your supplies list, I'm willing to bet that you were told you needed all that from a worker at a store, because to me there's some stuff in their that just seems like someone just trying to make money off you.

For instance you list a styrofoam background and another type of background. You'd only "need" one but you can make your own background easily and cheap.

you were told you needed a monsoon misting system? Why did the person say you needed this? To provide humidity? If so, you can do this with a cheap $1.00 spray bottle from the dollar store instead of a $100 monsoon mister that will break on you anyway. if you really want a mister system check out mistking.com