Ok, I've seen a few posts alluding to cutting a hole somewhere (in the steps to the bedroom, in the closet, etc) so that the cat can climb down into the basement area below, where the litter box would be.  I'm trying hard to envision this and having some trouble.  How does the cat get down there and back up?  Do you install stairs as well?  Any photos or diagrams you can share?

If I'm able to buy the rig I have my eye on, it looks like the closet is over the pin area basement.

Still hoping I can find the 3 felines a new home, but it's not looking very hopeful so need to plan on sharing our cramped quarters with them.

Thanks!