Queenslander, I am unsure of what you mean by stud heifers? .
Over here, we call seedstock breeders, ie. operations that breed bulls for sale , stud breeders.
Operators, like myself, that breed trade cattle are called commercial breeders.
Of course, stud cattle command much higher prices, but good quality angus heifers , preg tested in calf, would struggle to make any more than $1000,lesser quality much less.
Cattle producers here are doing it pretty tough at the moment, with stagnant prices and skyrocketing cost of production.
We are fortunate to have a road maintenance business as a sideline.
With a few pieces of gear, we are able to gross almost as much from it as we do from 1000 commercial breeding cows +progeny.
Cheers, Greg