I don't have cattle. But having done some sums the only way I can get them to add up is dairy X cows each rearing 2 calves (1 bought in). Or using cattle to groom pasture for sheep.Long and short of it though:
Fertiliser and feed costs are making ANY BREED of suckler financially unviable, whatever your system
I need over £3/kg store price to cover fertiliser. Haven't done the sums for fuel and feed.
Why keep cows to make a loss?