1080ti
pros
-it is easy plug and play
-a little tweaking using after burner with no chance of bricking the gpu
-low wattage (compared to 3x 570)
-future proof as it goes with 11gb
cons
-with a 750$ budget, you can afford to buy only 1pc with limited hashrate thus limiting profitability
-if ever the single gpu fails, your mining stops
-higher value of resale
-you dont have to buy risers
570
pros
-you can buy 3 pcs, 3pcs of 570 has more hashrate than a single 1080ti this making it more profitable
-if a single gpu fails, you can still mine with the other 2
cons
-you have to mod bios with a chance of bricking the gpu
-have to buy risers
That's all I can think of. Maybe I missed something. Hope this helps.
Appreciate your reply and I do agree with everything you wrote.