Hello and welcome to the forum. It seems to me from your reply that you are frustrated with us for expressing our concerns about you acquiring a cockatoo, but there are several reasons why we must. First of all, this is a forum that is full of advice, it's one of the main things we do here; we give and take advice. Secondly, you have come here and asked for one of us to send out beloved pet home with you, so we as a community have the right to question your ability to do so. Many of us have seen the tragedy time and time again of owners being forced to rehome their birds for financial, behavioral, or other reasons and we know that the #1 way we can all help prevent this heartbreak is to speak up BEFORE a pet is brought home.
This is especially true of cockatoos. Did you know that the average time a cockatoo spends in each home is only 2 years? Just imagine how many homes that is, and how you would feel being bounced around that much, from family to family with no explanation. Also, have you noticed how many pictures of plucked cockatoos you see compared to other species? I am not speaking badly about cockatoos, they are MAJESTIC creatures, I am simply stating that VERY FEW people are equipped to handle their needs in ANY area, from emotional needs, mental needs, chewing needs, diet needs, training needs, and yes, housing and financial needs.
Which brings me to the point many have already addressed - your idea of how much you want to pay. For starters, a quick internet search reveals to me that $1000 is a LOW price for an umbrella cockatoo, not a high one as you have made it sound. If you are unable to bear the purchase price, this is not the right bird for you. Wow, does that sounds harsh and judgmental? It is not meant to, it is simply something I have realized over the years; the purchase price of a bird is often a good indicator of how expensive the pet will be to keep properly. I wont go into how a $3000 vet bill can spring up out of nowhere even if you take good care of the bird, or how a suitable cage will likely be much more than the bird itself, or the expensive damage your bird is likely to do to your house, electronics, furniture, etc, but will simply talk about day-to-day costs. I do not own a cockatoo, but I own enough birds who are "moderate" and even "lite" chewers to know it can get expensive just to keep them in toys, and that is when most of them are home made or just branches from the yard! I have found, since I owned my first bird at age 11, that someone who cannot afford to pay full price for a bird, more often than not, cannot afford to give that bird the life it deserves. There are SOME exceptions to this rule, special cases, but they are not common. What IS common is for people to THINK they have the funds, if only they can get a good deal on the actual bird, only to find out the hard way they cannot, and off their bird goes to a new home, hopefully one that can afford them this time.
Also, I agree that bird rescues are a good place to look for birds, and yes, they are usually full of cockatoos, the poor birds. However, be careful, should you go ahead with your plan to get one. A cockatoo is a full-time pet no matter, what, but perhaps your first parrots as a couple should not be one with behavioral problems already. I say this because likely the only "deal" you will get on a cockatoo will be one with problems - big problems. I have heard a cockatoo scream from 1/2 mile away, loud and clear - do you live in a home where your neighbors are farther away than that? Or can you afford to move if the bird is too loud, or would you sell the bird? Can you afford insurance to cover if your bird bites someone? Cockatoos have FAMOUS beaks, and rescue birds can be less predictable, simply because of their history. I am not saying don't get one, I am saying "beware the bargain" and "you get what you pay for."
Another thing, you said you have 3 kids - how old are they? I know many people have homes where parrots happily co-exost with children, but do you realize that a beak that size could easily break, or even internally amputate a finger, especially that of a child? Do you believe with 100% confidence that your child will never put his or her finger in the cage? Do you have a plan for how they will interact with the cockatoo? It also sounds like you have other pets - what kind and how many? A cockatoo will not happily sit in his cage every night while you snuggle the cat or dog, do you have a plan for keeping the bird safe from current pets, and current pets safe from the bird? Are you familiar with the concept of displaced aggression, and the ease with which a hormonal or simply upset bird of that size could remove your eye?
One thing that might help us all understand you better is if you told us a bit more about why you chose this bird in particular. Why a cockatoo, and why an umbrella cockatoo, of all the species? I think a lot of our "disaster-o-meters" went off as horror stories run through our minds, because this situation could go so wrong. Not to say that it will, and not to say you are not the most loving pet owner alive, but you have given us nothing to go on.
All that said, you may still be offended that we dare question your wisdom in bird choices, and even more that we question your finances. I am sorry if you are upset, but you have come here to a community that loves, values, and fights for birds. Many of us have poured hundreds or even thousands of dollars into saving birds from owners who should not have owned birds, and many of us experienced sticker shock not when we bought the bird, but when we realized how much it costs to care for that bird properly. So please, if you feel our comments are unjust, instead of snapping at us or leaving, simply tell us more about your situation, get to know us, and let us get to know you because trust me, I have yet to find a better parrot resource than this forum. So if you do indeed choose to embark on the journey of parrot ownership, we would love to come alongside you in that. But just as a family questions its members and gives advice, we tell it like we see it, and do our best to have the birds' backs.