And I'm allowed to have it because it helps me with my depression,"A line in the article answers the question in this thread's title: "The American with Disabilities Act states "only dogs are recognized as service animals."

That's not to say that a market correction/recession/ depression/crash...ect will not happen; however, Real Estate will not cause, but RE could be affected by it.

Also, the A properties became depressed and created an opportunity for entry.   

Not paying rent, disorderly conduct that disturbs other tenants, damage or destruction of landlords property, violation of landlords rules and regs, not paying a rent increase, etc.

I started my search for lenders at big national chains to see the difference, and it was pretty depressing.

Imagine the background check coming back with:"a lengthy criminal record with prior arrests on allegations of assault, disorderly conduct, destruction of property, resisting arrest, theft, public intoxication, and possession of marijuana"I've applied for CCW.

Why is it that given all this information available today that people are less healthy, more depressed and less wealthy?

It gets too depressing DIY after a while, and your wife/girlfriend will not be pleased if you expect her to do it (unless she already owns a cleaning business).At the end of the day, your model is based on cash flow. 

Anywhere else and it was probably caused by the cumulative weight of depression and hatred.

I have a broad thesis outlining retiring of millions of Boomers likely having a sustained depressive effect on home values in the urban and suburban areas where they work and have worked for four decades.