@longasleep, you spent around 60 000 Euro just in GPU-s, another 5000 in 13 motherboards, 13 RAM memories, 13 SSD and 13 Power supply. That is a big money, from my experience you will need at least 2 years for return. Or, just to hope a big pump like ETH last summer for faster ROI. Just my opinion.
write it off instantly makes it easyer to mine newer coins.
its btw more power supplys 1080ti draw 200w~ at the best sol/watt setup.
8 cards on every board works so 10 rigs total.
my approach is not mining the most profitable coin right now.
i prefer mining coins that still have that 100x-1000x potential.
without buying the actual coin it will only cost me power which is cheap.
i got a big list of failed coins and a few big hits fun part of the game honestly.
most part is being able to afford the losses and being patient for the wins.
успокойтесь - купите сами на половину прибыли видеокарты а на другую половину прибыли научитесь торговать на биржах - и вы всё поймёте! )