Due to the increasing demand for energy in our everyday life, there is an increasing interest in the clean and renewable energy resources. this increasing interest motivates investors and stakeholders to increase the investment in this sector due to its long term cost effectiveness and due to its negligible pollution on the climate. Moreover, due to the growth of population and lack of enough resources specially in the outlying areas, engaging multiple energy resources will play a vital role in the urbanization sustainability and population distribution. Such that, on site energy generation will encourage people and facilities to leave the crowded large cities to other areas which in turn will increase the geographical space utilization. Therefore, solar and wind energy are considered the most useful sources of clean and renewable energy. In addition, simulation and parameters study for such systems has a great importance in the design and implementation processes. In this paper we will present a novel methodology that deeply analyze and simulate the design for windfarm to serve an important region in Palestine. And the results show the effectiveness of our system from both the technical side and from the financial side as well.