Spending on the hotel tonight as everything is going ahead, as far as we know. Of course, we need to leave soon and the procedure for DH is late afternoon, so we'll pass the cancellation window at 14:00. I can only hope that all of the relevant staff and equipment are available.
We might spend on a lunch or dinner tomorrow, depending on DH's frame of mind and how well he's recovering.
But, no regrets. This is why we need savings, to smooth out life's hiccups. We're fortunate we can travel the distance (nowhere more local, it's OOA (out of area)), book the time out of work, and afford to stay over to make this all easier for him.