Good luck doing this if you're in a committed relationship. Good luck doing this if you have kids, for example.
For anyone who's put down even basic roots, this is a difficult bit of advice, if not downright unhelpful.
If you read my other comment, I mentioned people who did the same thing that were low income too. I'm not saying it's for everyone, but if you can get it to work with your current skills and situation it's possible. You don't need a lot of money, but you do need to adjust your priorities.
And of course if you have family, commitments, etc, there are other ways you can break free. Let's list some other ideas for people. This is just one thing that I did.
1.) The general problems on this thread seem to be from professionals with good jobs, but feeling unfulfilled, depressed, lonely, ect. Thus it is a possibility for them.
2.) He opens with "this is why I did _____", and only talked about how it helped (and also hurt) HIM, not how EVERYONE should do this. Thanks for the post :)
Also, in terms of it being unhelpful, I think it's important to find a way to distill it to a scenario which isn't beyond your situation - get away for the week instead of a year, find joys in simple and cheap things, bushwalk with your kids, reduce to four days/week, etc. When someone gives their personal/general advice, it's your choice whether you find something of use there, right?
Even considering the restrictions of relationship and kids: 30% of my office is still youg-ish, single with over $20k in savings (as far as I can guess).
Not all advice is for everyone, but I think a long, long vacation away from your current tech career, that has left you with some savings, might be a good fit for this forum.