I agree with KML ... why should you be the lone person getting the house ready for sale? Ridiculous.
And another agreement, here...
Really, as much as you are done and are ready to move on and maybe even using it as a rite of passage and way to put the nails in the lid of the coffin...
Your adding a huge amount of pressure and stress to yourself which really, for your own well being, you should not...
I am sure you feel stuck and in limbo and all that, because it's not happening fast enough...
But then... take it slower, at least... just because it's HIS deadline, doesn't mean it has to be yours. You'll still progress and SEE progress if you take it slower... if he wants to speed it up, he has to add his own efforts...