I’ve worked two places that let you take naps if you needed them, they had a room and couch/chairs for people to sleep in. Both had stocked kitchens so I guess that covers “juice boxes”. They did it because you worked a lot of hours though, so I don’t know if that’s what you’re looking for.
I don’t know any billionaires, but I know a millionaire who put a small bed in the window of his office that he lays down on for 30 minutes each afternoon. Sometimes he sleeps, sometimes he just thinks things through and starts again afterwards. Not sure on his juice box status, but I would imagine he can swing that.
If your goal really is “naps and juiceboxes” there are ways to get there and take care of all the other things you might have to. If your goal is “nap, juiceboxes, and no responsibilities” you only get one shot at preschool.