I wonder how people who love to do all full rendered animations do anything.

Alittle 30 frame clip would take hours. So when would you even get anything done in a month?

you'd have to leave the computer on all day and night to render.

Aside from people who work in some animation studios and have render farms, I dont see why anyone by himself, would do fully rendered full quality animations. 

1 picture renders, fine. But animation? I would never do that. THe only time i render full is to  make BACKGROUND PICTURES to my Preview mode character animation. And the way i render those pics takes about 13 seconds and is fine for me.