I can unpack this a little. Here's my issue with the way the initial post was stated, and that "7 to 8 months," which I can't even. It's not the pro-wind sentiment that I'm taking issue with!
There are at least four major variables here, #1 the cost of the turbine and its installation (and maintenance), #2 the cost of financing, #3 the market value of the electricity that's being generated, and #4 the amount of electricity generated as a factor of how much wind the turbine will encounter.
#1 is where we can all be happy - turbines are getting bigger and cheaper. #2, well, you'll have noticed that interest rates can do some wacky things, and so the amount you'll spend financing your turbines might also vary quite a bit. #3 is an interesting one - we'd really like to build more and more clean energy sources, pushing the cost of electricity to the consumer down, but any given turbine is going to take longer to pay for itself if, after its construction, the cost of electricity continues to drop. Conversely it will pay for itself quicker if prices take off for some reason.
Regarding #4 - I guess it hurts people's feelings to think that turbines might be put in a suboptimal place because of politics, but putting that aside, we'd like to eventually put turbines in as many places as practical, and the difference between how productive a turbine on a mountain ridge or on the high plains might possibly be and a turbine in an urban environment might be is really high. I live near a 2.5MW Kenersys turbine that a company put on its urban campus, largely as a publicity stunt. It's glorious, but it's definitely not spinning as often as you'd like, or as much as it would in a better location.
Using some napkin math that doesn't really bear sharing, I believe it will pay for itself (pay for itself in terms of money spent and return on investment via electricity generated - not something hand-wavey and poorly specified involving carbon) well into the second half of its lifetime. That actually seems fine, it beats their getting all that electricity via the local coal plants, but maybe it speaks to the issue with these hand-wavey numbers: it would have paid for itself much, much faster in a better location. That's okay - as long as the turbine pays for itself over its lifetime, it's all good.