Lane does passive real estate investment, buy-and-hold, not house flipping. He discusses the formulas he uses for choosing properties and emphasizes the idea that you don't have to make a ton of money on each property...several "mini-pensions" coming in each month will set you up for your retirement quite easily. The key is to build assets that have a positive cash flow - many investments don't result in cash until you sell them, so they're not really assets until you sell.
You can find out more about Lane and his endeavours at https://simplepassivecashflow.com/ [https://simplepassivecashflow.com/]
He's got a podcast [https://podcasts.apple.com/ca/podcast/passive-real-estate-investing-via-simple-passive-cashflow/id1118795347] of the same name on Apple Podcasts.