The green one is a triple stacker. My Quaker is on the bottom, my cockatiel in the middle, and my adult finches (5) in the top. It has side guillotine style doors for me to attach a bath. each cage is 22h x 26 w x 20d. The whole thing, all together, is almost 7' tall.
The grey cage holds the (7) babies at the moment. They are awaiting new homes (I'll keep them if I can't find homes, of course). The little white cage off to the side isn't in use. It is for sale with two babies.
Notice the vacuum? I need to vacuum up that spot multiple times a day, lol.
I was thinking of building a corner flight/small aviary with plexiglass on the front and wooden sides (with vent holes, of course!) to cut down on mess.