Per 20 acres you might be lucky to have 1 deer, 20 squirrels and 5-10 rabbits. Dont know if you ever ate squirrel but the meat content on them wouldnt last a week. Deer you could live off for about a month if thats all you ate.
You also have to look at we are going into winter. Good luck growing any vegetables.
as I've said before don't make me explain everything, but yeah I've eaten squirrel before, and one squirrel will not last a week maybe a good meal for a a day.
the location I have in mind actually has very good fishing throughout the winter, not to mention duck and goose, I'm talking one day for a week or 2 worth of food capable.
plus side is also that the location I have in mind isn't very densely populated so I doubt there would be too much competition outside of the locals that are already there. which a fair amount would probably move out due to the lack of paying work that would be available.