Meet with financial advisers/wealth managers and see what other options other than real estate there are and how to best allocate / diversify. ie have you maxed out your TFSA?

For my units, I usually look for someone with annual income 40x the monthly rent so I know they are financially secure. 

Are you wondering more about the financials of it or operations? 

Your contractors, staff, and the financial markets will create challenges. 

Congrats on achieving a comfortable financial situation.Condos are actually riskier than single family rentals. 

You're not helping them either...you're allowing them to run a tab that is putting them financial ruin. 

Now it's an out of control machine with a lot of financial incestuous relationship in the tupperware farm.I like your analogy.

A financial calculator and legal pad might work in the hands of someone who knows what they are doing, but that doesn't mean it's the best way to do it.

Prioritize your financial stability.

I even try to unsell them on the business by sharing my financial losses, litigation,  market shifts, permit purgatory, shady contractors,  clouded title issues,  paranormal activity, squatters, mold, etc.