In order to account for the cost/risk of your rental payment, I would measure it based on ($ cash flow)/($ rent).

It doesn’t sound like you had defined criteria going in which would help you measure if this is still a good or bad investment for you.

I refuse to believe that lockdowns and mitigation measures will be with us for an extremely long period, until proven to the contrary.

You can't measure the ROI on relationships.

- How do you measure this?

I'm sure that there are other measures as well that can be taken if they do not get removed by the simple challenge, but that's a place to start.

This could be also measured in total profits including ROE vs cash flow alone.

What other measures would/do you use to calculate ROI on this type of property?

I've been reading "The changing world order" by Ray Dalio, and listening to some podcasts related to the subject of the declining US empire, and I'll admit it has me wondering if everything we hold true about long-term investing may be in for a shakeup in the near futureWhat I'm trying to decide is, should I sell a rental duplex (I have 2) and pay off my primary as a defensive measure?

But you need to be even keeled and scrutinies of where you put your money, so measure a hundred times and cut once.