My kitty was diabetic and went into renal failure. She was getting two insulin shots a day and subq fluids twice a day, plus the powder in her food. It helped her live a while longer, but eventually, she stopped eating and she looked worn out. We had to put her to sleep. I did not want to let go of her, but I she told me it was time. I did not want to get another cat after that and only took care of some strays that came into our yard and disappeared over time. Then Raiden showed up and his owner gave him to me because he didn't have time to deal with him and allowed him to roam the neighborhood. Raiden is 9-1/2 now and I dread the time when I may have to deal with something like that again. Bengals average about 12 to 15 years. But, at my age, Raiden just might outlive me.
I know what it's like to have to schedule your life around an ailing kitty and subq fluids, once you are trained, are fairly easy to do. My kitty tolerated that huge needle more than I ever did! Plus, the insulin shots.