So im moving into a place that's bills inclusive so i dont have to worry about electricity costs so i want to start mining, I have around 300 days and I want to leave my pc on mining during those days, i have a 660 ti and a 500w psu and a case but thats it. what should i get that would maximise the profit id get mining in the next 300 days? What extra gpu should i get, whats the most money efficient one when electricity isnt a concern, what cpu, motherboard and ram should i get etc?