If you are in a market that doesn't work, you can't force it.  

Power washing is a full force event of water gushing out of a power motor, through a hose onto the home.  

More units the lower the impact on your occupancy when you have people move.  

What items or hacks do you like that reduce costs and force appreciation?

I am also seeking for individuals like retail buyers that are just searching for a great deal on their next home, or better yet maybe their first investment opportunity.That being said there is always room for the families who simply fell behind due to things like-doctor's bills, job loss, forced relocation, divorce, death of a loved one, etc., these are just a few of the horrible situations that can happen to any home buyer along the road we all call life.It is my goal to personally and professionally deal with all of the parties involved, in a continued effort to find and secure as many solutions, for as many people as humanly possible. 

to give effect or force to (a law, decree, judicial sentence, etc.). to carry out the terms of (a will). to transact or carry through (a contract, mortgage, etc.) in the manner prescribed by law; complete and give validity to (a legal instrument) by fulfilling the legal requirements, as by signing or sealing."

Are there any NY specific concerns or impacts?

The answer to that question will impact vacancy rates, expected repairs, turnover costs, and general hassle.  

I've recently heard that if an investor files loss in his investment property in filling his tax, it will effect his next mortgage by impacting on debt/income ratio. 

So with each component taken as a whole it ultimately impacts cash flow and how the deal is structured.