My goal is to reintegrate all of my birds (I have four) into the same cage. I have a cage that is three feet tall and about eighteen inches? deep, probably a little more, and technically, that's enough room for them (according to the info I found here). But...I noted that budgies don't "fly like helicopters", and this cage is REALLY tall but not very broad.
My question is, where can I find a decently priced cage suitable for four budgieboos? Would it be cheaper to build one, and if so, where can I find the plans for it?