or you have a "all risk insurance" on your machine through a insurance company, and when the sad day comes when profit hits 0, the poor machine "suddenly" falls to the ground and stops working. The fee or excess is about 600 USD here in Sweden, so that gives a better ROI 
or never, once vertcoin forks in Q1 2019 
100 days, not gonna happen. Basic rule, add double the amount on your calculation day for an Asic and you are most likely there +- some days. And this only includes the difficulty increase, not an upswing or downswing of the market.
Right, 250-300 days most likely.
A 100 day ROI is perfectly fine by me. I would buy every one I could afford if they drop that low.
What merchants are selling for $2200?
https://img.krisdiary.com/image/d14v
CNY 15500 around USD2200
Free Power Supply
Expect a sub $2500 fire sales on Zig Z1 soon from all vendors.
Today!Merchant have 90 Second-hand Z1 machines for USD$2,200 to me,
but ROI needs 110 day and profit is drop so fast,
finally I gave up to buy it.
but ROI needs 110 day and profit is drop so fast,
finally I gave up to buy it.
What merchants are selling for $2200?
https://img.krisdiary.com/image/d14v
CNY 15500 around USD2200
Free Power Supply
Expect a sub $2500 fire sales on Zig Z1 soon from all vendors.
100 days, not gonna happen. Basic rule, add double the amount on your calculation day for an Asic and you are most likely there +- some days. And this only includes the difficulty increase, not an upswing or downswing of the market.
Right, 250-300 days most likely.