I apologize beforehand in case you feel offended.
According to numerous of your previous posts you are a super young girl, living at home, being home-schooled, and have ZERO big mac experience. When you first joined, you 'appeared' uncertain of what type of bird you even wanted, and within a relatively short amount of time your mind was made up that you were going to be getting a macaw. And of all macaws, a HY.
...
Hyacinth Macaw (I'll be getting one in a couple of years, as a gift from my parents. HYPED!)
Blue Throated Macaw
Eclectus (If not only for their specific diet, I might've already gotten one, lol.)
ANY Cockatoo! (I love their personality, but omg, their voice boxes are something else. XD)
African Grey (Mom's allergic to dust...)...
You've received some outstanding advice on this forum from so many members who have taken their time answering your questions, yet you always seem to have a 'better' answer already lined up. This is the perfect thread as an example:
http://www.parrotforums.com/general-parrot-information/53197-loud-african-grey.html
And this one, too:
http://www.parrotforums.com/macaws/53665-what-s-scarlet-like.html
You ought to really listen to your own advice, the one you gave right here:
A macaw shouldn't be for just, "PRETTY!" They're really intelligent and I see so many ads, legit ones, from people that dropped a couple thousand because hey! Why not? They bit the kids, and everything went downhill. I ain't a parent, but you have to understand, that a parent's own instincts to their children is a very strong thing. Are you sure you will forgive your parrot if he or she bites your children? What about noise? PRICES! Being a DIY master or finding Leprechauns to pay for toys? Stainless steel cages for the bigger macaws?
That, and she made it without second thought after watching the movie... It's not bad, but she has to realize that these birds also need a lot of time. It's not a canary. It needs to be out and with the family. My neighbor has a Congo African Grey and left it outside. No one goes outside to play with it, look at it... Just a morning feeding and change of water. I don't think my pound can care for a parrot and rescues can't do much, truly. Plus, my neighbors aren't "people." (Their lifestyle in general...) They're irresponsible obviously, but have many problems as well. [EDIT: She isn't the neighbor, it's the OP's "friend'] Not to say she's a horrible person, but evening just casually leaving them outside is easy but not what birds are for!
Those people are what can tear an African Grey apart. Now just think of a macaw! I don't know about their intelligence against, but it still isn't right. Rehoming them is also dangerous since no one wants a plucked bird/a beak like that. I would get a macaw RIGHT now if my mother wasn't allergic and if my grandmother stops asking me why their eyeballs are so big. (Dunno if it's because I'm Asian lol!) But it's not because she's weird or mentally not there, she's still the genius she is. It's just that I don't want her peering into my macaw's eyes or mishandling the parrot. You know? You really have to plan! Especially since I'm getting a rescue so it could change the circumstances.
EDIT: Also, more than just planing, can she have a consistent schedule? How old are the kids? Any age is fine, it's just from a personal point of view 8 or 9 seems okay for a scratch on the head or simply perch on the arm. I'm sure she isn't a horrible mother dragging her kids into a lion pit, but it just seems she is sort of not taking everything in. Plus, is anyone allergic? (Even if a macaw, some people can be allergic to a hypoallergenic poodle. A macaw is considered equivalent allergies wise, but allergies to something considered hypoallergenic is still a potential trigger.) Okay with the noise? Everyone has to be educated. Okay, they don't have to know how to make chop like a parrot chef. They should know the basics. There are tons of classes too! Many rescues give such classes. Volunteering or taking the family there to just interact with one would be awesome too.
No matter WHAT type of bird you actually end up with, they all require
consistent training and socialization, just as Bandespresso has already pointed out, to remain cuddly and sweet.
....I'm off now to cuddle with my knock-off Hy....

ROFLMAO!