[quickConclusion]

Tim Ferris got to 4 hours per week by working 70+h per week for a long time, then firing his least profitable clients, automating/delegating and giving up about growing his business further.

you'll never get there working 4 hours a week. And you'll never do 4 hours a week if you are passionate about your job, or a rat racer.

src: his book the 4 hours work week