I'm so sorry to hear about Katie's health issues, especially being a mystery makes it so much harder, I hope she can get some answers and treatment soon. It is good that snakes don't mind if we ignore them but I know how you feel, not having the time or energy to deal with them at all makes you feel pretty cruddy as a pet owner when you are used to doing more. Maybe one thing you could do is switch to disposable or cheap reusable water dishes, so you can worry about washing them at a different time but giving fresh water would be quicker. Also if you have an extra cage or tote, set it up so you can throw a snake in there for a day until you can clean a dirty cage, that way the snake is clean and you can deal with it later without worry. Set it up nice and you can consider it enrichment to boot. An extended fast for the snakes is no biggie even when it feels like forever to us and on the plus side, less waste is less work for you at this time. This too shall pass, hopefully sooner rather than later, you two will be in my thoughts.