I've given people I know who trust me personal guarantees and got loans for 1/2 my downpayment (they know I'm good for it as I can cover the debt on a global cash flow level).

But the internet told me it had cheap houses, one of the highest global crime rates, and awesome rental returns, so I did what any wise investor would do and spent all my savings on a rundown out-of-state rental property.

They will want to know about your other projects and your global cash flow.In my 27 years of commercial originating and underwriting, I have seen many cases where borrowers were individually so strapped with personal or other debt they had to take a draw from the subject loan resulting in the cash flow tanking.

The do look at previous income but it's not a totally "global" approach that most banks take.  

Or what if global warming/wildfires are worse than predicted, or a major employer leaves the area(think Kodak/Rochester, car manufacturers/Detroit, etc.)

Globally all income will likely need to be 1.4x all of your debt payments. 

How will the possible impeachment of a US President and US Supreme Court Judge impact the stock and real estate market, not to mention the global economy?

More globally, if this sticks you'll just have more room than you thought to handle the inefficiencies, and potentially over-perform.

Provide ReferenceHave a multiple active listingsAwards (Top Broker etc..)Clear communicationQuick in respondingKnowledge of area, Different area within cities has different expert agents...Knowledge of local and global economy

I think it would take pretty strong ecenomic shock felt globally to see it roll out otherwise.I also wouldnt be surprised if there was some relief provided in the mortgage stress rules.