Have you also take an account about the electricity price and other stuff maybe some cooler to make the room become less hot because of the miner. It's not just simply you can buy that miner and let it do the job easily. It's more than that, you need some stuff before even make it run properly for the first time, but other than that you will be familiar with it. It's better to buy Bitcoin in my opinion and hodl it as long as you want.