I have calculate that Bit-x and Hashnet looks not profitable (please CMIIW).
I haven't checked about Hashnest. Here is BIT-X's:
Cost per GHs: 0.0016
BTCMaintenance fee: 0.00000698
BTC/GH/Day
You can buy 55 GHs with 0.088
BTC. Then,
GHs Bought: 55
Total Cost: 0.088
BTCMaintenance fee: 0.0003839
BTC/Day
Earning: 0.00055940
BTC-0.0003839
BTC=0.0001755
BTC/Day
You are right. It will take 6+ months to hit ROI.
Then I will not make investment on any cloud mining.
Wise decision.