There's a script for that
There is a script that works for any sticky situation out there that you all can get yourselves into.
Here's how this works:
You present the situation as it stands now.
E.g. "Good friend BO is starting to slack on horse care....what do I do or say?"
"Buyer/seller just started behaving like a fool and I want the deal to go forward (or to end)."
"Horse trainer/barn staff/boarder is not doing what he/she said. How do I ask politely WTF and fix that or end the relationship with the least bloodshed?"
Next, you explain what you want and what you need. Those are different. You also might not know. This thread can help you with that introspection.
Finally, dear friends, you name and "own" your part in creating the fubar situation. This is the part you can now fix by doing something different.
Think of this as a cross between Emily Post, therapy and git-r-done practical, in-real-time advice for getting out of your sticky situation.
I and other COTHers not enmeshed in your hot mess are at your service.