He could probably own a car if he stopped using the ride share. He's probably spending close to $600 a month for the rideshare service unless he's splitting the cost with others. Average rental in Hollywood is (and this is the highest, which is twice what I found elsewhere) $5k a month. I'd rather split rent with some roommates and have a place of my own. Work from home instead of renting a desk. That's $2k alone to put toward rent. Two or three roommates and you could actually save money.
His lifestyle is a lifestyle driven choice, not a cost driven choice. He's paying extra for that lifestyle. Forget food costs since he can't very well prepare much food without owning storage space, so it's eating out all the time for him.