You can try Whattomine calculator and see if it really worth invest in mining. Don't use CrytoCompare since difficulty is not update and people tend to show higher than real income per month.

As far as I know In August 2017 1x  Rx570 earned about $1.4 per day without electricity concern. Now 24 Sep 2017, it's about 0.7-0.8 and will keep dropping fast.


I still don't know the reason a lot of writer (not here, I see a lot of mining guide coming around this month still use old rate that about 200% income of now) try to bait people in mining now. If you start now, it may take ROI about 1.5 years.

BONUS!

If you are living in cold climate then do it, it's like you get a free heater in your house.

But if you are living in hot climate then it's not worth it, with this ROI and hellish living experience. Believe me I am experience this but already invest then I must endure it.