Sorry to hear about your dad. There have been so many people in this situation anymore - including both myself in 2002 and DH in 1999. But things do get better. The best way to survive is what you are doing. Put the unnecessary spending aside for awhile.
Serious, if you go back to just basics, you will be amazed at how much you really do save. Then as things improve, add a few “fun” things. It’s amazing how we get used to needing so much that isn’t necessary. We live on a much smaller income now than we had before and do 3 times as much.
Second, especially while he is out of work - DO NOT CHARGE ANYTHING! That will only make it harder for you to get back out of this.
Actually, we don’t charge any vacations (anymore). They and our spending money are up front. You enjoy the vacation so much more.
And I agree, there is absolutely nothing wrong with saving staying at a value and/or free dining time. If you’re going to Disney to see DW - the parks, etc - then alls you need is a clean place to sleep. Stayed at values 3 times now and will stay there again, especially POP.