I can't really add to what Dej has said. Good advice.
As hard as it may be to befriend the realtor it really is probably the best thing to do for
you.
My only concern would be the cats. As long as they are safe and contained in a room the rest of the house can wait. I think most folks realize that people are trying to live there while the landlord is trying to sell it so they understand the occasional messy room.
I hope Jake feels better.