The situation might have changed now, but I remember what happened a couple of years ago with my friend who tried mining btc. He bought a couple of good Ant miners, about $500 each. He had access to free electricity and of course miners were not located in his flat, because they are extremely loud. They broke about half a year after he started and the only thing he managed to do is recover the money he spent on miners. Of course, if he kept mined btc up till the ath time, he would be very rich now, but the same would happen if he simply bought btc back then, so it's not about successful mining.