Outside of in-cage community politics between 3 potential birds, is there any benefit for you getting 3 babies instead of, say, 1 or 2? Your rationale in the first post just mentions that they're hard to come by. No judgements here, just questions -
Having gone through an emergency with our guy, and spending ~$700 on vet bills in just short of 9 days, adding three birds at once seems like an incredible commitment.
Whatever you choose, our one Bourke's is a happy (and now healthy) little guy who likes tons of attention, and is very bonded with us. If you want to bond with one bird, go for 1.