The reason why he built her home of concrete & cinder block is because it was a whole lot less $ than wood, it won't rot, the wind won't blow it down. (we have some killer dust storms here in the spring).
It's just so sturdy & even though it's not easy to clean when she won't move out of the way, when she does it's very easy.
Just soap/water with some bleach, hose it down then squeegee it out & it air dries very quickly.

We tried hay as a substrate when it was first built.. that made a horrible stinky mess. I couldn't get the odor out without bleach.
-----
PHRatz