Macaws are a lot of bird. I personally wouldn't recommend taking it. They need a ton of space and attention. They are VERY VERY VERY loud birds. Most people can't keep them in their house because of the noise level. They are also very messy. They chew everything, and I mean everything, you can't let them out of your sight. Toys are very expensive and very important. They get bored quickly and need a variety of toys to keep them busy. They destroy their toys very quickly and will need new ones regularly. If they don't get the proper attention and proper toys they will become bored and they often feather pluck. Macaws need a wide assortment of seeds, nuts, fruits, and vegetables. They are much more time consuming and expensive than a dog.
I don't mean to be negative either. I just want you to be sure this is what you want. Please don't rush into anything, read and get as much information on macaw care as you can before you bring him home. Also meet him and spend time a good amount of time with him before agreeing to take him on.