We have an aviary our birds spend all day in, outside in summer, but we bring them in at night. Rodents, raccoons, etc. could get to them, so we don't take that chance. Car sounds, bright lights, etc are also an issue. I also never feed my birds outside in the aviary as bees can sting them & they can have an alleric reaction. My B&G Macaw got stung & had to have shots.
Cage size should be the biggest you can fit in your house (thru your doors) , with appropiate cage bar spacing.
Dust is a huge issue. We have 2 floor model size HEPA filters running 24/7 & still have a lot of dust. A flap of the wings & dust in the bottom of the cage goes flying. Showers help, but you will always have lots of bird dust. With your husband having asthma I would suggest considering the Eclectus instead.
Most CAG's are not hands on birds. Most don't like to be held, petted or cuddled. They do this head drop, rub me fake thing & when you try they nail you. They can strike fast like a snake. They like to walk around on the floor & sit near you, but they are mostly hands off.
