mining using ant miner s7?

[BitMaxz]

Hi guys just want to ask if it is profitable if i had free power consumption using ant miner s7 right now?
If not what is the best miner to make it profitable?

[HagssFIN]

Try this calculator and see it for yourself http://tradebtc.net/bitcalc.php

It is hard though to guess difficulty change% for each adjustment, BTC price, etc. 

[SFR10]

If you buy it right now, with it's new low price, you get to get everything back (ROI) just right in time for the halving and anything after that would be a profit even though it will be with lesser reward per block. At the moment that is the best miner but after the halving, new mining rigs with more efficient chips will come out but again since you said, free power then you'll end up on profit side all the time.