the beginning of the end.

[Tartar Horde]

Horses with enough strength and body could be used to plough, but I reckon they would have to be quite "beefy", I don't think your average horse/s could do it, and I would be wary of causing them damage. In real terms Horses might not be too much of a problem to get hold of, but I suspect the Tack and ploughs might be quite hard to get hold of as it is old technology no one uses anymore, and I reckon the people who know how to make them are not so common either. I'm interested to know BP what type of Horses did your Brother in law use?
When I think about how the Aztecs and Inca farmed without the use of draft animals or the plough, we might have to adapt in the same way until we can re-learn the skills.