I hope you don't mind me asking this, but how old are you?
You seem very young and macaws are a HUGE commitment, any bird is of course, but the bigger the harder. And did you get your budgie, your first bird, just a month ago?
viewtopic.php?f=24&t=2357&p=40119#p40119You're most likely going too fast.
Think about it and learn what you have to know, and wait for at least a year. Parrots live such a long time, one year of preparation is nothing.
* Cage sizes
Many people keep macaws in cages 36-48 inches wide, but that is far, far too small.
Imagine a bird with a wingspan of one meter (40 inches) or more - how is it going to be able to flap and fly in there, and on top of that, have space for lots of toys?
They are very active, intelligent and curious birds, and need lots of stimulation, which means, lots of toys and lots of enrichment.
And since they have huge wingspans, ridiculously long tails and fly for miles every day in the wild, they need every inch you can give them.
I have my one macaw in a cage that measures 8'8" in width, 4'4" in depth, and about 6' in height, and it is the largest I have room for right now, and at the same time the smallest I could put a macaw in with a somewhat good conscience. To have two in there - fine if they have lots of perches (so they can get away from each other more), but still on the verge of being too small.
Here in Sweden where I live there is a law that sais you can't have a cage for a large macaw that is any smaller than 360x180x180 cm (mine is 260x130x180), so I'm in fact breaking that law.

Even if they have time out of their cage several hours a day (2-6 or so), that's still 18-22 hours every day, their entire lives, stuck in a cage that is always going to be too small, no matter how big you make it. So for the sake of the birds, it should at least be big enough to fly in.
* Biting issues
You can't, just can't - be afraid of beaks if you're going to have macaws. They KNOW they are big and they KNOW the power they possess. If you let that scare you, the macaws are going to rule the household, or worse, be isolated in their cage because no one dares to handle them.
* " baths?"
All parrots should get a bath at least once a week.
* Do Macaws get along with Budgies?
Definitely not. One bite from a macaw and no more budgie. My Meyers parrot is several times bigger than a budgie but she has to be constantly supervised when she's outside of her cage, since she loves to land on the macaw cage and he hates small birds.
To have them outside at the same time is out of the question, which is kind of stressful and of course lessens each bird's out-of-cage time.
If you live in the US, you should definitely be able to find a parrot rescue close to you. Spend some time there, interact with the macaws, and look for advice with those who work there and know about the birds. See what
they think about how you would fit as a macaw owner.
