I see it all the time, central air or heat on in temps that feel wonderful.

I am a member of the United States Air Force and am actually currently deployed. 

From personal experience most just pull their ARV out of thin air.

shop around for other companies like the one you mentioned. see if any of them can get a better cashflow, or even guarantee a certain number. compare these to listing it on Air-BnB yourself.

Your performance must be air tight.

A nice week-long vacation in many areas will run you $2500 once you tally air fare, hotel, food, and rental car so when you put it into perspective, the money you spent isn't that bad.

You will need to take it down if your lease says something like modifications are not permitted without first receiving permission from the landlord.You may have done a great job, but the porch used to be open air and it is now mostly opaque.  

Just FYI, I also require a 2-car garage, central air, and built after 1965.  

He/She will know what to check before attempting to energize the panel.If you read the PCR - Property Condition Report - on the HUD listings, that's how their people do it: when there's no power, hook up a generator.The HUD inspectors also use air pressure to test the plumbing rather than risk having Niagara Falls indoors.

As to the cold on the porch you can help with that by air sealing the interior of the porch.