So make sure if mining is your way to go. You can calculate your income/revenue here:
http://www.coinwarz.com/calculators/bitcoin-mining-calculator
Remember that most asics don't come with PSU's which means you need to add that too on your ROI estimator.
If the electricity price is over 20 us cent/kwh, it is not easy to mine. You will not be profitable after the block reward halving.
It would be a bad idea to even attempt it. Just find a hosting center if you are wanting to own a miner. Over 20 cents just cannot compete with others mining.
Its a way to almost guarantee a loss. So why do it? There is no reason financially speaking I can think of vs using a hosting center that will be around 1/2 the price of it.