Terminal as transparent wallpaper in xmonad

I recently switched to xmonad and I'm trying to pimp it up a bit. I'd like to set up a terminal as a transparent background (https://wiki.archlinux.org/index.php/Terminal_as_a_transparent_wallpaper). Basically, I'd need a window that sits on the bottom of each workspace, that cannot be moved, tiled or closed and gets focus only when it's the only window open in that workspace. So far, I've managed to make the window boring to get the focus behavior I want, but I cannot make it float and stay below everything else. Is there any way to accomplish it? Or maybe a way to doIgnore the window but allow focus on it to type commands?