The popular advice to rent and invest the difference fails because people rarely follow through, instead spending the extra money. Homeownership acts as a forced savings mechanism, with homeowners in America being worth 40 times more than renters on average.

A key principle of "old wealth" is using debt with an interest rate below market returns to grow money exponentially. Conversely, "new wealth" challenges traditional wisdom by recognizing that in many markets, renting and investing a down payment can yield higher returns than home ownership.

To quickly compare, multiply a home's price by 5% and divide by 12. If you can rent an equivalent home for that monthly amount or less, renting is likely the better financial choice due to owning's significant unrecoverable costs.

Contrary to popular belief, a primary home is not a true asset because it consistently consumes cash through mortgage, taxes, and maintenance without generating income. For wealth-building purposes, a true asset must produce money while you sleep, which a personal residence fails to do.

The trope that renting is 'throwing away money' is flawed. Rent is a payment for valuable, non-financial assets like location flexibility, freedom from ownership costs (taxes, repairs), and the option to invest capital elsewhere—potentially in higher-return, more diversified assets like the stock market.

Oppenheim argues that financially, renting is often smarter than buying. He states 90% of his clients would have been better off renting for the past decade, avoiding taxes, commissions, and maintenance costs in a flat market, while gaining valuable mobility.

Buying a house, especially the largest one you can afford, locks up capital and incurs numerous hidden costs beyond the mortgage (maintenance, taxes, renovations). This inflates your cost of living and hinders wealth creation compared to the simplicity and lower costs of renting.

The "renting is throwing money away" argument ignores opportunity cost. When renting is cheaper than a mortgage, the difference can be invested in higher-yield assets like stocks, historically outperforming home equity and creating more wealth over the long term.

The idea that renting is "throwing money away" is flawed. Rent is payment for a service that provides shelter, flexibility, and insulation from the risks and hidden costs of homeownership like surprise repairs, property taxes, and maintenance. This "optionality" is a powerful, though non-tangible, financial asset.