You have to deduct the electricity {at your rates} for the mining and the cooling and also a little bit for the internet access. I should say about
1 year, if you lucky or even a little bit less. There are a lot of variables like difficulty that might influence your final outcome. I would not waste
my time to mine 1 or 2 bitcoins in a year. I would rather buy 1 and hoard it for a year and get the same result, with a lot less risk. My return
on investment by buying and hoarding long-term has paid off nicely.