I am lucky to be able to have a bird room with a large play gym that I can leave her in. I also have a companion bird in there - Charlie the parakeet. I leave the radio on for them some days too. Some days I put her in her cage in the livingroom where she can see the TV and leave that on for her. She can also see out the window. I let her decide where she wants to hang out while I am gone. I have lots of toys, I rotate which ones are out, and rearrange toys and perches often. I do have foraging and destructable toys and hide treats around in her cage. She finds the treats all very quickly, so I don't know how much good it does except make her happy to go in there! LOL!
I think Kito is pretty quiet for a larger bird, I have never heard her scream. My conure was much louder. I'm glad I didn't get Kito until after Jolly the Jenday passed away though. I'll bet she could scream good and loud if she wanted too! I'm pretty sure Amazons are considerably louder. I find all her whistles and noises quite pleasant, but if I were you I would talk with my neighbors first.
Optimally (from what I have read), you should have at least 3 different areas where your parrot can hang out (even if one is on the outside of their cage) and they should have a minimum of 3 or 4 hours (total) out of the cage daily. Some days this isn't possible, so if they can get out for 30 minutes three or four times on those days it shouldn't bother them too much. Spend at least 5 to 10 minutes of that time face to face with them when they are out. I have rearranged my life so that Kito is rarely alone for more than 3 hours at a time. I miss her too much if I'm gone longer than that!