When and why should I refinance a property that is paid off?

[Zac Boelkow]

I recently Purchased a duplex and paid cash. I’m on month six and things are rolling along positively. My question is do I refi and take 75/80% of my cash back out of it? My intention is to work my way up the ladder with multiplexes. Would I want all my properties (with cash flow) to be financed? This question is obviously based on a positive cash flow scenario.