This topic is very interesting one. Many people believe that placing a wind turbine will generate fossil fuel free energy right away. This is not the case.
In order for the wind turbine to be constructed, materials have to be obtained, processed, transported and put in place. Concrete and steel and fundamental for the wind turbine construction. Also the neodymium magnets have to be manufactured (neodymium is a rare earth element has to be mined and transported). An interesting summary can be seen here
Once the turbine is in place and generating energy, it has to have a backup of fossil fuel because the wind does not blow all the time. A lithium-ion storage would be too expensive. this has to be added to the cost.
Finally, at the end of the life of the turbine (25 years) it has to be decommissioned and the cost is elevated. More than US$ 500,000 are needed for this, according to this source.
So when all the calculations are in place, for a 2.6 MW turbine, it would take about 8 years for the energy generated by wind to cover all the energy needed to create it. To the following reference I have added the decommissioning costs.