Question about BRRR strategy

[Richard Townsend]

Here's what I don't understand about the BRRR strategy. I purchased a house for $100,000 a couple years ago with 20% down, and now it is worth about $180,000. After all expenses it has positive cash flow of about $100 per month. There is plenty of equity "trapped" in the property, but if I were to refinance it out in order to purchase another property, I would end up with negative cash flow on the original one. That's what keeps me from purchasing a second property. What am I missing?