I don't like seeing birds in cages, despite that I do realize that they should have a protected space. You probably already have a carrier which would be needed for vet visits or during building evacutations (fire alarms etc), so rather than a cage, why not a miniaturized apartment within your home for the bird? Sort of like a doll-house for the bird. With big picture windows (screened of course.) It might be a bit more fun and cheery than any cage.