....They also left some literature which was very clear about not feeding pigs anything that had been prepared in the house and stated that there were strict punishmenst for anyone found doing so. I'll see if I can dig it out but I think I binned it in protest

I'll see if I can find a copy online...
Feed the leaflets to the pigs???
I think the whole 'how much space' thing depends on
a)How 'simple' you want your lifestyle to be -my parents have a large ish vegetable/fruit garden, you can grow a lot on 1 acre, just that it'd get a bit food wise boring day in day out, without the supermarket to suppliment it, and
b) if you want animals. They take up a lot more space. That’s when it get harder I’d guess, as cows, horses need rotation through the fields so the grass can grow back.
People survived 100 years ago, I can’t believe they all had 10 acres each?
How sustainable is sustainable?? You would really need a small tractor, fair enough, I don’t think they’re *that* costly. Ignoring one-off costs, where do you get the money for the fuel – from another job, savings etc, or by growing more than you need and selling it???
Edit: Thinking about it, what do you do in the winter?? it's all a bit bleak food wise and muddy then, without any nice fresh fruit to make things ok. Potatoes keep ok in a cool garage etc, but stuff like chickens, they don't really lay many eggs in the winter do they???