Welcome to the site.
Something our older members must think about is their lifespan vs a parrot's lifespan. Bear in mind that bare-eyed cockatoos can live up to 50 years. If you are a retired pensioner, then the bird will likely outlive you or you may find that you are in a position where you are unable to care for it (e.g. should you enter a nursing home or sheltered accommodation). If you wish to purchase a young bird, please do put plans in place for it so that, in the event that you are no longer able to care for it, it is not bounced around between substandard homes on craigslist or gumtree.
Alternatively, you may wish to adopt an older cockatoo. Depending on which country you're in, there may be a nearby rescue. Your experience with cockatoos may well make an older cockatoo very happy.