Having a granny flat can be a great extra source of income; his point is that it's "on top of" rather than "instead of" having an IP, with a land component.
Bignath, no sarcasm intended. What I meant was get an IP first then add a granny flat forextra income. Usually the granny flat is rented out seperately.
This would be a starting point to building wealth through property. With a high wage from your trade, rental income and equity you could quickly grow your portfolio.