The two other methods I am aware of are installing a motorized main damper to direct flow to the area calling for it and hydronic boilers driving several remote air handlers.

People just hibernate in air conditioned buildings or simply travel through the summer...

Month to month leases are not short term leases, usually they are 1 year leases that are transitioned into moth to month when the lease term expires thus making this completely different from Air BnB style rentals

Air Force Veteran of 9 years, looking for my start.

I would like real estate to be my full time job but I currently have 3 years left active duty Air Force to build op a large enough portfolio. 

This is good because 1) no additional re portable income 2) I know if a tenant is serious or not if they go online and actually do it.

New cranes in the air will probably not help the current rent situation from a landlord-perspective, as more competition comes (however, this usually comes along with more upscale tenants now exposed to the area). 

I'm thinking about doing Air BNB though because I am a bit hesitant about having someone on a year lease. 

Like upgraded electrical, heating, ventilating, air conditioning, plumbing, ADA, etc...Where this comes into play is if say a tenant of one apartment unit sets his unit on fire, burns it up and now you have to go in to rebuild his unit. 

If this happened at night , all you can see are my eyeballs and teeth floating in mid air.