That's definitely an interesting way of looking at it. I don't have that kind of self discipline, and it's not really helped that I'm both an automotive and tabletop wargaming enthusiast. Both pretty expensive hobbies unless you know what you're doing (especially when it comes to things like Warhammer). I have to wonder if it's possible to do what he did nowadays, where I live the median house price is 500,000 AUD.
A passive income that I could live off of would be great, but all of the passive income in the world isn't worth squat if I can't make music. I'd wager you feel the same about cars/gaming.I don't have that kind of self discipline,
Honestly, I don't either but I was smart enough to marry a women that does. She balances me out. I'm not a car collector or a gaming enthusiast but I am a musician that loves buying new instruments.