The transition towards a sustainable future requires a thorough analysis of energy sources and possible alternative fuels used in industries and in the transportation sector to address one of the main problem that affects them nowadays: the CO2 emissions. In a transitional and continuously changing energy scenario such as the one taking place nowadays, this paper aims to evaluate the techno-economic feasibility of a "green farm", a polygeneration fuel plant in Southern Italy, specifically in Sicily, with the peculiarity of being able to have a flexible production of renewable hydrogen, Liquefied Natural Gas and Bio Liquefied Natural Gas (Bio-LNG). The farm will be placed in Southern Italy, specifically in Sicily, a promising geographic area with significant industrial demand for hydrogen.