'I see chicken things'....all the time...usually they are quickly dismissed.Yes, I spend way too much time looking at and/or thinking about coops at the moment!
But I can see the attraction here!
Not sure I'd replicate it by building, unless you have a lot of that thin lumber the boxes are made out of, but being able to get the unit that's there would be brilliant!.
Had same thoughts as others.... maybe too tall, taller than roosts or for gathering eggs....or could cut it in half mount lower and attach to wall for stability.
Could cut them all separate and mount to wall.
Might need perches out in front for easier access, if they stay stacked.
Could put plastic bins inside for easier cleaning.
Hope you can grab them!!