Indeed they don’t, but that doesn’t make this bad advice. S/he is explicit about their financial security, and this advice may be useful to some.

I'm not rich. But I am pulling in about $800/month in passive income from an investment of about $30k into a multiplex and living for free.

If more people saved 30k to buy a multiplex (and lowered their standard of living) instead of buying a 40k vehicle (and accepted driving a $5k used vehicle)... then they would also have the same security of pulling income.

It will only take a few years of sacrifice and careful saving to achieve this. But it is worth it.