@longasleep, sure I understand you, i am also new coins hunter. I am still mining with:
60 Gpu R9 380X,
10 (old) Gpu R9 290X,
20 asus 1070 8Gb,
20 asus 1060 3Gb
20 RX 470 8Gb
8 Rx 480 8Gb
8 Rx 580 8Gb
Usually mine 4 or 5 different coins on different pools. My rigs are 4 Gpu, 6 Gpu-s and some 8 Gpu, from 750 to 1000 W power supply. I pay 0.07 Euro cent 1KWh. Also still have 3 Baikal 600Mh from the beginning, but I made a mistake, because is much better if half of this money buy any currency. Always trading can take better ROI. Again, it is just my opinion.
P.S. Please don`t judge me from my posts and activity I am old enough in mining, little number of my posts its because I am not good in English.
Seriously, how on earth do you power like a 100+ gpu farm, and the noise would have to be earnumming.
It is not very easy to manage specially during the summer. At the beginning there was a lot a problems with electricity too, than I change all AC power cables. Noise? It is not such a big noise mining with new generation GPU cards, if not overclocked too much and undervolted. Belive or not, during the winter I put working two or sometimes more rigs in my daily room just for heating the room. For me they are not too noisy.