Can they stall and try to run out the feasibility period?  

If that is the case, it's likely appreciation will stall/reverse too.

I'm not sure if this applies to ESAs (though I do know that it is not legal to deny tenancy to someone with an ESA), however, when it comes to service dogs (ONLY dogs and the odd miniature horse, can be service animals), handlers are not required to disclose that they have a service dog to a landlord, as service dogs are NOT pets - they are defined as medical equipment under law.

@Marty Joyner there's some good information on this post in regards to buy and hold and vacation rentals, so I won't beat the dead horse.

I think you are putting the cart before the horse.

He said parking space, not parking lots or parking structure, so I was assuming he meant just a single parking stall.  

Whoa, whoa, whoa...back up the horse carriage.

If you get off that horse in mid stream, you might get wet.

Could stall your closing for a couple weeks to get it corrected.

Apparently that is what similiar homes sold for in the area and if there is a mortgage involved that is what the lender is going to base their mortgage on.This is not an unusual occurance the seller may or not know what their house is worth and a third party has put a value on it.Time develop your horse trading skills.