I dont get why I see these threads over and over. Im pulling almost $30 a day ETH or 600 + RVN coins. 12 cards. 5 RX 580 Saphire Nitro + Special Edition, 5 EVAG 1080's, 1 EVAG 1080 ti FTW3 and one MSI 1070ti
$30 a day with ETH those 12 GPUs? Sure you are.. I highly doubt it.
Anyway what you need to consider is not TODAY but the NEXT MONTH (June) because that is when the first batch of Z9 ASICs arrive and that is probably also when NVIDIA may announce the new series of 1100 GPUs. Z9 ASICs will reduce profitability and new GPUs will surely reduce the value of your old GPUs.
Add to that the threat of Ethereum switching from POW to POS, then you have a massive shit storm coming to miners. Probably not a good idea to start mining right now.
I have 6 RX 480 and 6 1070 and I make $20 a day before electricity costs with is about 1.50 per rig ($3 total). I started mining Jan 22 and my break even date is July 22. You can believe what you want but the math (and the coin in my wallet) says otherwise. You just have to do your homework. Build as cheap as you can, and hope everything goes as planned. 1100 GPU wont be out till Q4 of this year if that and I wouldnt worry about ASCI. There will always be coins to be mined and if CN is any example to you what happens when ASCi threatens... you just change the ALGO and ASCI goes away. BTW If you dont think those ASCI are on line already you are fooling yourself. Bitmain is the biggest ripoff in Crypto and fools keep throwing money at them.