Permaculture and diversifying could be the way to go and even probably keep the kids interested or at least coming back to help in the next 10 years.

In Europe there are dairy cattle and sheep grazing in a mixed fruit-nut orchards, so plenty of alternative revenue streams.

Also, selling the raw material was always and always will be the worst possible financial way. So is there a way to NOT sell the milk but make aged cheese, cottage cheese, kefir, yogurt, etc?