Refer to the Department of Energy's "Guide to Renewable Energy."
How does this sentence develop the concept that the costs for installing a small wind system will vary from
place to place?
Purchasing and installing a system can range from $10,000 to $70,000, depending on local zoning,
permitting, and utility interconnection costs
.
It gives specific figures of how much a consumer should spend to install a small wind system.

It shows that there is more involved in installing a small wind system than some might expect.

It mentions a price range and gives some of the local expenses that could be involved.

It suggests that a small wind system can be too expensive to install in most places.