@VawX Well, as the owner of two cats, it varies. For mine all it takes is feeding a certain size of portions a day(one portion for each actually, or it would be too much), replenishing the water, cleaning their sandbox, taking care they don't go to the street and lots of cuddling and attention. Not that much, since the ones that are actual tasks take 5 min and are kinda easy to remember.
They like to play with each other and they do each other company when me and my mom are out. Most of the time they just sleep. Cutely, of course.