I totally agree with the above post. Also, I'm sure that zoning laws in your municipality are very strict about this kind of thing. You could probably only build it in a C4. And the device could fail in a number of ways. What if she falls through the hole onto her head?

Do you carry malpractice insurance? How about an umbrella policy? And remember, just hosing her down every day WILL NOT provide sufficient sterilization between uses. I suggest Purell on her whole body.