I recently bought an S4 from bit main on their latest deal. I decided to host it with umisoo and have to pay 150 $ /month for the power usage. I found lot of good reviews on f2pool and decided to use them.
I have now been mining for 1 week and my average hash rate is ~2 Ghash. My average payout is 0.02400611 BTC. That is equal to 0,7 BT per month. Which with the rate of today is equal to ~260 $. So that means that my profit is 110 $.
Note that I didn't calculate with the difficulty increase. With this small calculation you can easily see that it will take me at least 8 months of time to get my invested money back = 850 $.
Yes that's right. Do you honestly think that there would be such a thing as a money making machine that made more money than it cost? If that were the case, wouldn't everyone in the world want one? Mining is an expensive way of converting dollars into bitcoin while securing the network while hoping the value of bitcoin rises in the distant future to offset this cost. Economies of scale are the only way to minimise the amount lost in the process but at greater risk due to more initial outlay.