I also will use contractors if there is an emergency while I'm on vacation.

Plus our water usage is already below the reduced amount of water we can draw if they declare a drought emergency. 

If not, then before putting a penny into real estate investment, I would figure out how much money you'd realistically need to cover your necessary expenses for 3-6 months and set that aside that portion of the $100k in an emergency fund account that will earn interest.

Do you have an emergency contact for him, or know any of his family members or friends, or maybe his social media? 

Agencies that provide emergency rent funds typically require the applicant to provide proof that their rent is in arrears and that they are facing eviction.

And going to the courts to petition an emergency entrance with the “police” would take days.

That's certainly a good option, however, if I am investing my emergency fund, if an emergency ever does happen, getting that money out probably won't be the easiest route to go. 

My leases specifically state that Heating an AC are not emergency conditions.  

Put $30K down and reserve $10K for emergencies.  

There is some competing technology emerging in the form of high powered, ground-based cameras.