Sorry for butting in. I bought a plastic gate pen. It has 4 walls, one of them with a door. There's no floor or ceilling. I put wee wee pads, her bed, food bowls and toys in there. She sleeps there and is in there while I'm at work.
Here is a picture, I got it on amazon. Delivery was free.
http://i14.photobucket.com/albums/a3...IMG_2689-1.jpg