keep in mind theres alot of variables, but the bottom line IMO is : Mining is a long game now, EXPECT a year+ ROI unless you have "free" power ;p
But this calculator doesn't count the increase of difficulty, and it's the crucial thing for ROI. 1y of ROI is fine, but with ASIC you find it to be more like 2+ years.
Thx for the calculator, very useful, well this one show infinite ROI, sadly i think with ASIC as i stated before, it's either you buy it just to have one, but it's lost money, or you can invest half a million $ and make real money lol.