If you are saying $3 per day with 1 graphics card then I must say that your are the greatest liar ever, not even with 1 x gtx 1080 ti which you pay $700 - $800 makes $3 per day and it is the best card for mining to date, I just checked whattomine and it says 1 gtx 1080 ti $1.24 profit with electricity paid mining equihash, so where is the $3 per day you said is beyond me, see that is why people start get in mining cause you trolls are liars about the profit you are making, now tell me whatthehell did you say that? do you have a mental brain problem, illness or that kind sort?
And by the way, at the current price, $750 for a gtx 1080 ti divided by $1.24 = 604.8 days to get your money back, that is almost 2 years and if we also add other parts of the equipment for example motherboard, cpu and other things that will make the target to get back around $900 per card which the true value to get back is $850 divided 1.24 = 685.4 days to get your money invested back, so meaning mining is the worse thing to do right now. Go buy coins and hold, trust me you will earn a lot more money doing it without hassle.
what is it with the angry replies on this forum, where did you get one GPU from? I've got 5 x 1070s. I answered the OPs question with his concern with electricity and brought up the hardware ROI. You apparently have the mental brain problem as you read into things that are simply not there.