In September there will be almost no profit in mining. Just mine now from your home instead of renting a facility.
That is wrong. It is the exact time when AMD RX Vega Frontier cards will be out, they will be out for another purpose but in the end they will be used for mining too. The specifics of it were terrific , people expect to reach at least 45-50 mhash on Ethereum without overclock. So those cards will be the new Eldorado of mining as soon as they arrive. There is still the GTX 1080 ti which will continue to be profitable in mining although profit will drop significantly during September and on too.
Who cares about getting 45mh/s with VEGA when 45mh/s will be about $0.50/day worth of profit.
Difficulty doubling every month, ice age will be 30 seconds in Sept, and price is ETH can still fall to $50-100 a coin.