I read the book, and it did make sense. Amazing, that!
If you purchased the book, the how should be self explanatory.
Skim less, understand more. :-)
But I found it very conclusory. It never really explained how. It seems like almost everything I read was "I saved more money and did less work, thats how i did this." But there was no explanation exactly how he did it. Most of the examples I read did not fully explain the nuts and bolts of how to do it. Sure, if you want inspiration, go ahead. But you don't need a whole book to say you work less and earn more. He can say that in one line and be done with it. I expected more, and I found it lacking. To me it was the equivalent of writing a book on stocks and filling up 300 pages with "I bought high and sold low, thats how I'm rich."
I'm quite confident my skimming did not result in a lack of understanding, but more. I skimmed a lot, and each part I skimmed lacked substance. If it consistently lacked substance, it told me not to waste my time.
Anyways, to provide a real answer and not to just diss the book, I doubt many start-ups work a 4 hour work week. The fact is, there is a lot of work to get done in a start-up. If you only worked 4 hours a week, and you needed 2000 hours to get it done, well, that would take you over 9 years to get done. You can't magically make start-up work go away. Outsourcing only works if you have capital to pay for it. So if you don't have capital, and 9 years is too long, then you might just need to work harder, longer, and with more people to get it done.