It looks like you and your father are getting caught up in the enthusiasm of the situation and are now "running on adrenaline". Please stop and consider the situation a bit more before taking any of the actions you've discussed. I don't mean any offense, but my impression is that you and your father do not have a clue about what you would be getting into. Please attempt to get more insight as to what is involved, and experience with macaws, before acquiring any, so that you and your father might have even half a chance to effectively live with one (or more). There is a reason that so many lose their homes!!
The reason why there is some haste to this is because I have a very small window of time that I can add a new bird. My dad is leaving the country on Thursday because his mother is dying and he will be gone for at least a month. I could wait until he comes back, but by that time I might be adopting Cheerio the U2. I want to be able to give whatever new bird I get some time to be the new bird before having two new birds that need to be quarantined and assimilated into the family. And we have been considering adding a macaw for about 2 years, it was just me that didn't know if I knew enough about them to really consider getting one despite reading published literature on them. Then I discovered this board a couple months ago and after reading hundreds of posts about living with a macaw, I realized that I CAN give one a great home.
We DO have a clue about what we're getting into. We may not have actually owned large birds before, but we've both been around the noise, mess, cost, bites, and every "drawback" to having a very large bird enough to have a good idea about it. The only time we have ever rehomed a bird that didn't die naturally or lost when a 5 year old let them out, was my old conure who was placed in another home while the house was being remodeled and really bonded with them after 6 years with us. I will never rehome any of my birds unless I was dying or the bird was IN LOVE with someone else who could care for them just as well.
So given the short window of time that I am comfortable with adding a new bird, I would like to because I can. I have all the resources needed and if I need help with anything, I know several macaw owners personally, some others live around me that are on the board, and I have this board to turn to as well. I was not picky about which bird I get, I just wanted to give one a home that I knew I could accommodate. It just happens that I've always had a father who likes to get me everything I ever mention wanted, and he knows I do enjoy babies. So like all the birds I've ever had, whatever bird I get will have the very best care and everything it would ever need. If I felt that it needed an indoor/outdoor aviary, we have the space and means to get started on it immediately. So I have a great home for any bird, not all of them but at least one or two more than the one I have now. Why not give a home to a bird who needs one, whether it is a rehome or a young one from the breeder who has no buyers?