My order is for Bitfury ASIC unit and costs 20 BTC. Delivery date has been confirmed for late October but may only happen in November.

I should be seeing 1 watt per GH in terms of power usage.

I might have been incorrect in terms of the increase in difficulty, what I meant was it would see a 50% increase every 2 weeks (or sooner) according to some models I've seen online. The only way I'll be seeing a ROI within 3 months after November is if I buy a 400GH/s unit, which is 120 BTC.

I'm not taking into account the cost of a BTC in $ by that time. I'm just wondering if I should rather take my money elsewhere and cancel my order