Regarding the photovoltaic park, it is under discussion considering the chaotic changes in energy. Regarding wind turbines, they require a large investment to produce, and the location and wind is key for such a project to be functional and profitable, this creates difficulties in  managing such a project. The hydropower plants installed on the rivers also require a large investment. To start one from scratch, with the purchase of components, installation, landscaping, land rental, even taking an older one and refurbishing it requires large sums. As an idea, a small to medium size turbine starts somewhere between 800k – 1 mil. Euro. Same as in the case of wind turbines, the location must ensure a sufficient flow of water so that it produces 12 months a year and does not affect the ecosystem, capturing all the water supply. Obviously, everything has a solution. With time, the right team and capital, everything is possible!