Repair Guides

I got this off Bigger Pockets and am not sure how this translates to NYC but see the below.

http://www.pillartopost.com/costguide

Inside Airbnb

I must say I am impressed by this site. This shows data on Airbnb postings in NYC. I have not fully digested it but it certainly a strong presentation of the extent of use of Airbnb here.

http://insideairbnb.com/index.html

Green Roofs

The City has a green roofs program. Don't know if it applies to small building owners but worth a look.

http://www.nyc.gov/html/dep/html/stormwater/nyc_green_infrastructure_grant_program.shtml

Good Calculator

I came across this calculator today. Pretty good for a quick and dirty.

http://goodmortgage.com/Calculators/Investment_Property.html