Can I Raise 2 beef cows on 1 acre?

A single cow needs 1 to 2 acres for grazing on a per month basis. You are capable of keeping 2 cows on one half acre but you would have to feed them hay or feed for most of the year. You would also have to regularly dispose of their waste. It wouldn't be very cost effective to raise two beef cows on one half acre, because you will be paying a lot of money to buy a lot of hay to feed those cows for, maybe, 360 days of the year (with only 5 days spent on that 1/2 acre pasture). If you want to raise a beef cow for you to butcher and eat, one should be plenty. But still one half acre would not be enough room for grazing. Unless you are in a rural area there may be a law against you having any large animals on such a small piece of land.