$3k into solar panels, energy is not free. An r9 295x2 does the mining (amd is better for mining than nvidia). The intel i5 4660 to run the mining application (a stock heat sink is fine). You need other components to make those other parts work like, a 750w corsair psu, lga 1150 mobo, a hard drive or ssd like the crucial bx100, and a case to deliver good air flow like the Antec Three Hundred Illusion Black Steel ATX Mid Tower.