Should i buy a Air Conditioner?

Would you use one if the temperature was 70-80 again? In less than a week it will be back there. If you didn't need it before, and you buy one now, you will use it when the temp gets back to normal. You will have a big bill long after the unit is paid off, because of the power usage. You need to decide if that big bill is worth it to you. If so, then buy it. There is nothing wrong with having it, but it will cost you money long after it is paid off.