So I have drilled down to some cards and I found the following options from a supplier overseas-
a)1060 6GB~ $140 - $160 (new 3 yr warranty)
b)1080ti 11GB~ $500 - 450 (new 1yr warranty)

So basically I can spend about 3k on cards resulting in - either 6x1080ti or 20x1060

i used whattomine to check which coin is best for the above cards, and seems like ROI on the 1080ti are bad, however the 1060s will take 1.5 years

is this normal? or am I just too late, which is why its bad for me?

What do you guys do. same as above?? use a profit calculator and mine the best coin? are your ROI on hardware around similar time as mine?

Am I missing something regarding mining.