You need to do a walk though of the property.

If you do an inspection and find up a chewed up molding, schedule a repair and she pays for it (not at the end during final walk out, but scheduled inspections).

Whats up BP, I'm in the process of having my contractor walk thru a property to provide me with a scope of work and quote.

I always look for ways to improve a house when I walk in.

The goal was two-fold: 1. find a good home with good schools near enough to the city center and hopefully walking distance to things to do. 2. find a home with an income suite (basement apartment, mother-in-law suite, etc.) 

I added drywall and turned an upstairs room (previously used as a sewing room) into a master suite by adding a walk-in closet.

On the surface, it sounds sketchy, but as others have said if the agent has the homeowner's permission then no fuss, no foul.Sometimes people just walk away and they don't care about the money. 

Does anybody have any idea or estimate, as to how much a three story walk up fire escape would be for a building in Brooklyn , New York ?

@Kalen Jordan, one difference between the two are the curbs and walks.

So--as you alluded to in your question--I would recommend you find a fire restoration company/contractor to walk the property with you and give you a good understanding as to what needs to be done.