Definitely no. Only large farm can afford to mine these days. If I were you, I would go for some PoS coins.
Yes, i think so . Shouldn't mine these days. low prifit even you can lose.
I highly suggest everyone doing their own ROI. No you can no longer (on most) get the guaranteed 3 month ROI like it once ways.
If you have low electricity you do have a chance at mining. Especially if you get good at making the miners efficient and then sell them once your done with them.
Yes it is a risk some will ROI some will not.