dh doesn't eat beef, so it's just me and my girls. Granted, they're both hard core carnivore
but, the little one has a thing against food that requires chewing, so she pigs out more on nights when we make ground beef than on steak.
Anyway, we split a quarter, so that's 1/8, about three times a year. So, a full side would last us over a year. But, we're a smaller family than you - one adult and one and a half meat eating kids, so approximately half as much load on that beef.