A human being needs food, water, and shelter in order to survive.  I’m sheltered on the 22nd floor of an abandoned office building.  No rent means no job, which leaves me free to cook, garden, and other-hobby away.  Food, laundry, and water take some planning.  Since I love to cook and the office building doesn’t function well as a kitchen, that takes even more planning.  That’s where my hobby comes in.