I doubt seriously that you could make a sustainable living off of 70 acres. I have a friend who's family owns 360 acres and activley farms it... they added a feed mill to their operation to be able to make a living. It is HIS opinion that 500-600 acres in that area would be the absolute mininmum to make a living. I have another friend who's brother farms in northern Louisiana and he farms 1000 acres and leases another 1500 acres. He makes a decent living...when things go right.