Current commercial-scale wind turbines cost in the neighborhood of a dollar per nameplate watt.  The foundations, installation, and grid interconnections are extra.

If sited well, the economic benefits are considerable.  Jerome Guillet of The Oil Drum has noted that wind displaces the most expensive generators on the grid at the time.  This lowers the market price of all the electricity on the grid, and can save consumers much more than the actual sales price of the wind power itself.

Wind farms can pay back their invested energy in as little as 3 months.

I think you will find that the electrical side is much less of a problem than the design and construction of the turbine. There is a good introduction to that side at
http://www.clemson.edu/scies/wind/Poster…

You need to ask yourself some major questions as the first step.

1. what power level output do you want when the wind is blowing?
2. what percent of the time do you have sufficient wind?
3. Do you want a grid tie system so you can sell power back to the power company?
4. How much storage do you want (batteries)?

#3 is important as it controls the answers to #1 and #4. With a grid tie system you only need a small battery. Plus the system will take care of switching your house wiring between power company when there is no wind, and turbine output when there is wind.

Or do you plan on a separate set of outlets through the house so you can unplug from mains power and plug into wind power? that seems expensive and complicated.

#1 is important as it sets the size of the turbine as well as all of the associated electronics. If you are selling back to the power company, you want this number to be as big as it can be, as that makes more money for you.

#2 also is important in setting sizes.

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Not sure where your headed with this but the rpm of the fan if directly connected to the armature is a function of output capacity..If the rpm drops off a little the V(o) will too…A mag tachometer can monitor the rpm but the control is a little harder..One way that is parasitic is to place a pretty large wattage lamp in-line to the output ..The lamp regulates the PEP spikes with heat…and you get a fairly even output. The actual wind speed of the turbine can be monitored with an anemometer and read on an analog scale. Just looking at the fan on a calm day even armed with all the pitch elements and sail surface notes won't get you there ..There is just too many variations …If you buy this turbine commercially they should furnish you with a curve that represents voltage/amperage at X air speed…Good luck with the project..from the E

No, its not your building. Wind power is good in the desert, they cant be heard or seen by anyone. They don't belong in urban settings.

Assuming you own the property – I'd call or check online with the city first to see what regulations are in place. If it's a go, I'd start talking to a contractor.

Sure but you have to have enough wind to power it. The amount of power you get is a cube of the wind speed so you get 4 times as much power from a 20 MPH wind than from a 10 MPH wind. In NYC it prob isn't worth the cost.

Find out the cost first, then if it will be worth it check with the building code enforcement in Queens and ask if there is any ordinance that prohibits it. They must be able to point out a specific ordinance that CLEARLY does not allow it.
New York is a tough place to do anything that might make sense, but Good Luck
I heard from a friend that a company is making them with a 20 year life span for around $ 8 thousand. ( 20 yrs without any major service)
Good Luck we should ALL have one.

Before you waste any time and money at Earth4Energy (in the other answer), read this:

http://www.nlcpr.com/Deceptions6.php

If you want to find out what a wind energy system can do for you, find a real supplier or installer (not a website that sells ebooks) and talk to them. If you cant afford something like $10,000 – $20,000 for your system, just forget about the idea.