I have 3 cats. Easy to feed.
One cat needs one eye-drop (extremely easy) in one eye at each visit. He actually begs you for the eye drop because he knows that he gets a treat :)
One cat needs insulin at each visit (extremely easy). He is so good and doesn't flinch. It literally takes less than a second to do. I can teach anyone to do it because it's so easy.
Clean cat box, check water, show love. Same care you'd give your own pets.