Suggest not to mining, if you have low power channels, you can try. The current market price, or a little profit. But within a short time bitcoin price changes too much, if the purchase of many mills to mining, met price drop too much, then it is easy to loss, we must pay attention to risk control.
I think that buying will make you a lot more bitcoins because mining gives you a small amount of btc. But when you buy a lot of btc then the value goes up and will make a lot more bitcoin. I think that this is the best thing to do to make yourself some money.