That is not realistic because you need to consider following factors:-

1. IbeLink 10.8 Ghs will be going live in quantity of 5000 plus by Mid of August thus increasing the difficulty and network hash rate significantly reducing payouts.

2. Antminer D3 15 Ghs will go live in last week of September in thousands again it will massively increase the difficulty and hash rate.

3. So by the time 30 GHs innosilliocon is released (and if the same specs because in past they always announced higher specs and low watt but in production delivered 50% less Ghs and 30% higher wattage) i think it would be making you somewhere around $1000 a month maximum.

Note: This is just my calculation and the realtime calculation depend on how many Ibelink, antminer d3 go live before Innosillicon 30 Ghs is unleashed