That's an extremely rare opportunity though. 

I would say a common error that people make is underestimating the cost to fix or repair something.

First, I would recommend calling around to apartments and other PM companies in your area to find out what is common. 

Most postal carriers have enough common sense to recognize which box is for unit A and which is for unit B.

You seem extremely confident in your initial claims, take me up on it.Either way, I do appreciate the honest feed back on my posts from both of you, I understand that NY is one of the hardest markets to succeed in, but I am a firm believer in the Stockdale Paradox (Jim Collins, Good to Great).Best,-JonThis wasn't a back and forth.

I think this is extreme price gouging, especially since we did not agree to pay that kind of money and if he was expecting that kind of money, he should not have awaited to the very end to tell us.  

It’s a very common misconception.

That is an extremely difficult accomplishment in the near-term.

To put it nicely, I would proceed with extreme extreme caution, if I were in your shoes. 

As I understand it 100% deduction on expenses that are soley related to the business or the rented unit, 50% deduction on expenses that relate to the general property as a whole ( mortgage interest, insurance premiums, common area repair expenses).