remeber you are dealling with a potential 10 thousand dollar bird, that will live for 70 years, my old boss had 4 (grand total of 50 grand), his were in alrge outdoor aivaries, the animals will need some access to outdoors.
keeping them confined inside is exactly the same as a 4yr old in side, they will destroy everything uinless prop trained
as for the lung conditions, more common with household budgies, its a mite that causes irritation, my dad had it and had surgury to fix him up (water on lungs- hes a smoker to so that didnt help), if you sourse your bird from a reputable breeder, and keep it in hygenic environmen, you should have no worries
Do NOT CONFINE