The black palm cockatoo can be a good pet, but don't expect it to be as affectionate as many other parrots. They require a lot of attention to tame though they are very intelligent and social birds if the owner is consistent and can provide the time and attention needed.
Cockatoos require a lot of time and attention–much more than any other pet bird. If you are able to spend at least two full hours a day with your bird (out of his cage), not leave the house for 6 or more hours everyday, cook for your bird and provide him with a variety of healthy foods, handle the loud screaming, afford the large cage and huge amount of toys, and deal with the adjustment stage that can include aggression, then rescuing a Cockatoo might be a great idea. Make sure you research as much as possible because you don’t want to add to the already out-of-hand rescue problem.
Because so many Cockatoos are left to rescues, I highly encourage you to visit your local parrot rescue, see what I’m talking about, and consider rescuing one of these poor magestic creatures instead of buying one in a store. If you can handle all this, then this really might be the right bird for you.