I once read a book called 'Five Acres and Independence'. It's around here now but can't seem to put my hands on it now. But I think that may be the sweet spot. I think your location makes a great deal of difference. I see you're in TX and if you can get sufficient water, you could probably do 4 seasons of cropping.
I actually think it is possible on 2 acres but 5-10 is likely better. For cattle, it is recommended to have an acre of good pasture for each cow calf unit.
You can do goats or cows for milk.
Don't forget about honey bees.
Doing rabbits, squabs, quail, chickens, turkeys, etc.. You may be able to get by with fewer hooved animals.
I'm providing quite a bit on an acre. Annual and perennial veggies, fruits, berries, mushrooms, chickens.
Another thing to consider is sales. If you get more milk, eggs, wool, honey, veggies, fruits than you need, you can sell or trade for things you need.
Fuel is another concern. In the book I read, a woodlot was considered important. Even on just an acre, I have as much wood as I need.