Hi there! I write Bird Hearts Bear and my husband built that bunny condo, so if you have any specific questions about it's construction while you're thinking of adapting it for quail, please ask! I know he'd be thrilled to fill you in on it.
We used peel-and-stick tile from the hardware store on the floor of the cage and our dig-happy bunny has not been able to damage even one, so I highly recommend them. We also used milk paint(which is super non-toxic), 4 coats, and it has held up absolutely beautifully.
I also have "It must be pretty" as a requirement for things, so I completely understand your girl-logic.
~Chae

I also have "It must be pretty" as a requirement for things, so I completely understand your girl-logic.

~Chae