There is a web site that should help you, some what.http://rredc.nrel.gov/wind/pubs/atlas/maps.html
2797 kwh's a month, thats a pretty tall order to fill for an "off grid" system utilizing just wind.
If you were to install a wind genny rated for 10,000 watts max. in a wind speed of 28 mph then, roughly speaking, that would need to be sustained 28 mph winds for at least 9 hours a day, or some variation of that. Maybe sustained 14 mph winds, 18 hours a day. Everyday. But there are a lot of variations like, in a 14 mph wind, the genny may make less than 5,000 watts.
Also if there is one day the wind does not blow at all, battery storage for one 24 hour period would need to hold more than 90 kwh's or more than 1875 amphours at 48 vdc nominal. Thats just one 24 hour periods worth.
You may want to supplement wind with PV as well as conservation.
To give you an idea, if I were paying for my electricity at a rate of $0.12 per kwh, my electric bill would be about $7.00 a month as opposed to your $335.00 a month electric bill. I admit though, my propane is higher than normal. It performs the tasks of; refrigeration, cooking, hot water (assisted by solar), and supplemental heat. But even the LP bill averages out to about $45.00 a month.
As distasteful as it may be to some, I am quite comfortable here on our farmstead. I did have an advantage though, I learned how to live without any electricity at all for over 25 years first.
I never get tired of writting this.
From whatever beginnings one believes that mankind had on Earth, we can all agree that several thousands of years went by up to the advent of electricity, which started only about 100 years ago. Mankind flourished without electricity for thousands of years but now in just the last 100 years we cannot live without it?
There is something wrong with that picture.
Or is there?
I am sure that somebody is laughing about it, all the way to the bank. Probably the only sour note in their day is when they think about how its not illegal to live without electricity under punishment of law... Yet.
Total revenues in 2008 increased from $343.7 billion in 2007 to $363.7 billion in 2008 primarily due to the 6.7 percent increase in the average retail price despite a 0.8 percent decrease in total retail sales of electricity.http://www.eia.doe.gov/cneaf/electricity/esr/esr_sum.html
Its understandable why RE is trying so hard to get a slice of that pie.