Sure its possible. Buy a NNN Walgreens for $4.5 million. 8% cap rate, and since its NNN, you get to collect that 8%. 8% of $4.5million is $360K a year. Sounds like a living to me, and then some.
Or, buy it with 33% down and get a 7% loan with 20 year amortization. You still have the $360K coming in, but have $279K in payments going out. Still, your net is $81K, which could be a living. Certainly is much better that most people in the US do. You'd be doing better than 75% of US households, according to the 2005 census.
And, that's a truly passive income. The ROI's only 5.4%, so not great, but better than CD's. You may well be able to do better with other investments. Any investment can fluctuate in returns and value.
Did you mean, can you create an active business, hire a bunch of employees (i.e., "virtual assistants") and set back while they turn the crank and generate you cash? I suppose, but I've never seen it done. Anyone I've ever dealt with who ran a business, large or small, busted their hump. I think this whole idea you can create a business, hire a bunch of staff, and just let them do the work while you scrape off the gravy is guru BS. Its intended to sell courses and bootcamps, not actually produce a living.
Now, I like some of Tim Ferriss' ideas. Can you devise a product that can be manufactured, have orders taken by someone, have the orders fulfilled by someone else, have someone handle returns, etc? Yeah, that might well be possible. Can you do that once and have a long term business? Not a chance. Tastes change. Costs change. Prices change. I can guarantee, just from watching this happen to my parents business, that if you find a profitable niche where ANY sort of business works, you WILL have competition in short order. If your employees see you're making money and not doing any work, they will, at best, duplicate your business. Or, if they have access to the cash, they will just steal. Certainly not every one, but it only takes one to bring down a small business. I've seen that happen, too.