Sort of like in the '90s, the trend was to sell workout equipment that was easy to use," said Greene, who says he owns rental properties in several states. Last week, Greene shared with Insider two tips from his book that new investors can follow build wealth. 2 'incredibly simple' strategiesThe first is house hacking, or renting out part of the property you live on to a tenant. When the second property is paid off, you can then pull equity out of that one, and so on. "You'd just live off of the money that pull out of your properties if you work really hard for 15 years."

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