Thanks @Marcus Auerbach and @Weston Couch! 

@Weston Couch thanks.

The seller isn't going to fly in from Oklahoma to haul a 10 year old couch across the country so they leave it, and everything else, for the buyer.

Someone doing the Scott Trench-style "rent the rooms and sleep on the couch" approach would know how multiple leases on the same property holds up in official ways better than me.Best of luck!

Or will they come to their senses and scramble to find a relatives couch for a month or two?

Haha, no think couch surfing.  

I've been couch surfing for 6 months.

plus, they were told to move everything out of the back area but didn't do it - the renter told me he was going to put plastic on his couch yet he didn't do it and they think that the plumber should have protected everything.

Furnishings such as couches, rugs, toilet covers, etc are not included in the sale.

These Negative Nelly's will call it a lazy, sit on the couch and wait for it strategy, The truth is that they are fantastic tools to change your mindset.