You technically can be profitable with an undervolted S7-LN, current Bitcoin exchange rate (1BTC=$961USD), and inexpensive electricity (around $0.09 kW/h). You are looking at roughly $0.25/Day if everything goes well.
Since you have to cough up some $$ for acquiring a miner such as S7-LN, you won't make money at all.
Just get some USB stick miners and do it as hobby.