Actually yeah you're definitely right. My perspective was for people who have other uses for them e.g. gaming or local inference. From a pure finance standpoin

Actually yeah you're definitely right. My perspective was for people who have other uses for them e.g. gaming or local inference. From a pure finance standpoint you're definitely right - you should rent and not buy a dedicated card. I think you'd need a few thousand hours to break even which is a few months 24/7.