I have a male wb caique. He is extremely time demanding. I wish I had gotten the female he was bonded with as a baby when I bought him. I made a huge mistake that has no doubt cost him happiness in not doing so.
Whether they reside in the same cage early on, depends on whether the bird is raised and bonded with each other or if you are buying from separate breeders. If they are bonded, I might be okay with it. If bought from separate breeders, I would not, at least until I am confident they will not attack each other caged together. I would NOT put two caiques into a 32”x23” cage. It is much too small. Caiques are EXTREMELY active birds. My bird is in a 48”x30” cage and uses every inch of it. He also has a night cage. If caged together, I would be very cautious and watch their behavior for aggression as they near maturity. Caiques can be very aggressive and cause severe disability to other caiques and other birds. I would be hesitant about putting two males or two females together.
Dont forget that they are wild animals. They were not bred for pet traits, as dogs are. You will need to take this into account as your bird develops and matures, to ensure you meet his/her needs. This includes providing the largest cage possible, the best diet, out of cage time, touching, preening, vet care, dealing with hormonal aggression, screaming, and the constant fight against caique boredom. Plan for this to be a 35 year long relationship that will require dedicated time and care on your part every day.