However, her mom is going for more chemo, which means her immune system is compromised. 

Gives the impression you're willing to "work with them" on a fair compromise for repairs.But if it boils down to a matter of "he said" vs.

That way, if you receive an approval that has a something other than $0 and $0, then you call the negotiator and try to make them compromise.

Maybe proposing a compromise split that would be more beneficial to me while still having the guidance of the partner broker is a better idea? 

There are a huge number of dishonest (and downright criminal) people in real estate and I believe that most of them started down that path by making small, seemingly insignificant compromises at first. 

Def want to be easy to work with and add value... but I'll be honest and say I wasn't thinking of that at first... there were other issues in inspection that we decided we'd take care of and only ask her to do the clean out, thought that was a fair compromise... but I guess not LOL 

If it is just an ok deal, maybe it isn't worth putting yourself in a potentially compromised position.  

I should also mention that, better than cash for keys, is finding them a seller finance deal that they can move into with their compromised credit.  

How can we come to a compromise here?

And it makes sense, it should be a good compromise of independence while still working towards the goal.