Had to cancel my trip in the last minute as my wife is in a medical emergency.

I suppose that requires a second (or third or fourth) opinion, but if he's right, where can I pull cash from to both complete our primary home, and refill the RE emergency fund I'm currently depleting?

If you don't have any liquid reserves, you should build up 6 months of expenses as an emergency fund (in case you get laid off, disabled etc).

He wasn't giving into the state and local governments mandate for employees to be forced to wear masks, get vaccines, etc and he started getting "threats" saying that he could be taken to court and have assets seized if he continues "breaking the emergency laws" during covid time.That could be viewed as an extreme example, but things like this worry me as I have my own company and employees.

How do they handle emergency repairs?

Just make sure you maintain a financial cushion for emergencies.

I was planning to buy my 4th property soon, but depending on how this goes it may have to wait.For the LTRs: does anyone know if FEMA or other governmental agencies help tenants with rent payments in an area with emergency declaration? 

And probably stress as well. 90k is good for a 25% DP + Closing Costs + Emergency Funds for about 300k (give or take some).

Alternatively it could mean there are neighborhood fundamentals that were late to be identified or recently created that lead to an emerging neighborhood. 

sounds like a good plan, but would get a HELOC on your guy's current primary - FOR EMERGENCY PURPOSES ONLY!