OK, Here's the latest update with I think is what the OP wanted.

The cards can be moved from side to side with any amount of cards kind of like an open rack.
1 PS (although a second can be added).
4 80mm front fans, 3 120mm mid fans and 3 120mm rear fan in removable tray.

http://i.imgur.com/mHUH9hc.png

Need to get more info from the OP on the rear card support.