STAY AWAY if you dont know what you are going into.....

i think you should better start with this: https://www.nicehash.com/profitability-calculator
you'll answer your question yourself.

GPU prices are SUPER HIGH, and ROI is just DIRT.

See... 1080ti the best one --- costing around MIN 90k ($1384.14 approx) in delhi, india; where as the ROI is $1.47/day on NeoScrypt.
So you need 941 days to get your money back.

Consider other issues also before following the blind race

1) RBI's crackdown on cryptocurrencies - Though it's not a very big effect, but only for ADVANCE PROFESSIONALS; still full of risk for newbies.
2) Also this is not just 90k, you need to buy new Power Supply for this GPU (17-20k), MotherBoard (7-10k), SSD (4-5k), 4 GB RAM (2k)
3) Also to cover just your GPU costs, you need to run your machine 24x7.
4) Electricity cost would be additional, this beast consume good amount of electricity depends upon the kind of Scrypt you are mining