No.
Difficulty adjusts every 2016 blocks which is ~14 days when difficulty is relatively static.
If BFL numbers are to be believed difficulty will more than double just the first batch of pre-orders go out. So even those who get a Jalapeno on day 0 won't be getting ~$84.69 for the first week. More like (assuming rest of your # are right) ~$12 per day for the first 2 or 3 days and then difficulty will double.
However if you buy now you aren't going to get your BFL product on day 0. Take a look at the BFL Single's delivery thread for an idea of what kind of delays to expect. If you get your Jalapeno 12 weeks later difficulty will have already tripled or possibly quadrupled by then, also factor in the 25 BTC drop and likely some future difficulty increases much more significant than 8% per adjustment. If we compare the MH/W and MH/$ to GPUs difficulty could easily be 5x to 10x as high as it currently is within a few months if BFL can keep deliveries going out in bulk.
I am not saying "don't get a BFL Jalapeno" I am just saying your numbers are pie in the sky fantasy land. Even those who get theirs on day #0 won't generate that kind of return.
This. Main points:
1. Reward will halve in early Dec (earlier if ASIC hits before then).
2. BFL are now saying pre orders will start to be shipped in early NOv and they expect to have them all out by Xmas. If you order now it could be next year before you see anything.
3. Difficulty will go through the roof when these start to properly hit the network. Difficulty could well go up by over 10x very quickly.
Therefore, Jalepenos are still worth buying (I have a pre order in) but you cant use todays figures with tomorrows equipment. ROI is likely to be in the order of months, depending on how quickly they ship the kit and where you are in the order. Still worth it but not a ROI in 2 weeks!
However, electricity is not cheap where I am so these will be a god send!
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