Hey Jen, I feel for you and know just how you feel. I wish there was an easy answer or solution, but I think we all know there isn't. Perhaps all I can offer is my sympathy and to let you know I am sending happy vibes.
Perhaps also just remember to stay on track in a time like this and don't lose you cool (hard I know). Remember if he has been left with a big responsibility (looking after the business while you were away) he could be a bit burnt out. He probably just needs a little rest and also reassurance that it's OK to do that, for the moment. From what I am learing, the less you try to force him to fix the leak, the sooner he will get to it.

I am by no means an expert on any of this as I have not even had the chance to practice caring for my PTSD husband properly yet. I am just waiting for him to come home so that I can.

Best of luck and Merry Christmas.