Keep in mind also the electric power cost. Depending on the price of electricity in where you live, it may not end up profitable by doing the mining by yourself. That's why now most of the miners put their operation to where cheap electricity is. Bear in mind that electricity is not only needed for powering the mining machines, it is also need to power the cooling system as well.
That's why I ended up with Genesis-mining, this kind of cloud base mining services.