Btc mining isn't profitable, you should have thousands of $ in order to set up a mining farm, otherwise you won't earn anything.
I honestly wouldn't even consider it with less than an hundred thousand... I've had a quick discussion with a dude some time ago who was going to invest in an established farm by buying a share. I think he was going to invest some 7-digits number.
I'd say that's what it takes to get into BTC mining with reasonable risk by now. I told him to do a GPU multipool instead!