The whole system is low cost
Present system:new system
Feeder wagon + tractor + fuel + man to drive it: No feeder wagon or tractor running costs, fuel, labour
Bought in concentrate feed, maize: much less bought in concentrate, no maize (maize is expensive to grow and harvest)
Autumn calving, herd needs to be housed and fed silage and concentrate at the peak of lactaction: Spring calving, cows calve as the grass starts to grow so they are out in the fields eating grass when they are making the most milk, and need little if any concentrate.
Making lots of silage, incurring contractors costs and the cost of feeding it out again: Eating the grass straight from the field - much less cost!
Seasonal calving, both spring and autumn, mean that the labour requirement is more seasonal, ie calf feeding at one time of the year rather than all year round, the same with artificial insemination, etc.
I have just realised that spring calving will conflict with lambing time - I wonder if Ruth will want to get rid of the sheep, and even the beef cattle? Most spring calvers I know only have cows. It does go against Brookfield's mixed farm ethos though.