You need to recoup the $7,000 for the electrician on top of the miner costs, hope your power is cheap/free and/or LTC BTC prices go to the moon 
Is not cheap neither is free (.1 Kw/h) but anyway the way that i see it eventually i gonna brake even also got dash and more L3 miners on the way + this is a learning experience thats gonna give me the knowledge that i need to do a bigger project in the near future. Knowledge is not free at least not this kind i think.