LolHey we’re on BiggerPockets, not firsttimebuyersfordummies……if you NEED a realtor to hold your hand with regard to values of crown mounding or air handlers, hey go for it.

Once you are able to make the property a rental, hire a property manager to handle rent collection, repairs etc.

I thought about just blocking the vents on the second floor, but it can mess up the air handler if I reduce the CFM its meant for? 

I received an email from my case handler today and she said it's approved, and to wait for the update on the web page.

And if you fail to follow the rules, you could lose the additional protection it provides.beware when the snake handler tries to sell you antivenom. 

Also take a look at the grading of the surrounding ground to make sure water flows away from the house, not to the house.Siding can hide many damages, if you see patches or cheap siding recently installed, it is time to start asking , what and why.HVAC, how old, how old is the ducts, take a peak in the the registers, how dirty they are, HVAC handler closet, look for mold in this area, the condensate water drain condition and where it goes.Electrical panel model and manufacturer, google it for recalls.Floor carpet if any, I hate carpet because it hide damages and if it is secure you cant pulled it to look under, look for stains or cold spots, that is an indication of a wet spot. specially near baths Kitchen or egress doors.Kitchens and baths, old or new, try to look behind frig and dishwasher, they hide a lot of  water damages and are very subjectable for mold growth.

The most expensive part of adding forced air to a house without it is the duct work, followed by the actual air handler and compressor. 

@Carlos Handler, welcome to BP! 

There is honestly a bad HVAC balance problem, but it's more something that I'm worried about wearing out my air handler super prematurely than something that they can't adjust to make their stay comfortable.

It’s an odd situation- I wouldn’t expect a tenant to mess with dampers at the air handler, but crazier things have happened.