best miner is the s5, produces 0.01 btc a day for 14.4 kw a day
one of this miner can be found for 1.5 btc(maybe a little more), so you need 5 months to break even if you have
free electricityand this is the best case scenario, now based on your electricity the break even time should double or triple
p.s. i think you was searvhing for this?
https://bitcointalk.org/index.php?topic=1039704.0