Yes 10 acres would work.You can do quite alot on 10 acres well organized!! We almost feed 4 folks year round on little more than 10 acres(almost). It still costs us money for groceries, but the cost is very limited, and best of all we get to eat good naturally raised meat and veggies. No pesticides, or growth hormones in our meat and veggies.
Do you heat with wood?
Sent from my garden [emoji482]