It would be extremely difficult for us, I expect extra family to show up. That is why I'm trying to raise at least the protein in the form of animals. At the present time I have a couple of pigs and chickens on the place we rent. Right now if the measuring formula is correct they are about 300 pounds each. The chickens are Production Reds, but are two years old. They will be in the freezer in the next few months as they produce less eggs. i did have decent success with meat birds this year and rabbits in the past.
Planning to kill one of the pigs, after Christmas and see about breeding the other one. If I can do that it get me one step closer to being self sufficient. Even though I'm not truly self sufficient as I get most my feed from the local feed store. Scraps for the house do help, but pending on just scraps is not practical.
You can only do what you can do, but you have to put into practice what you are going to depend on. Hunting in my area is problematic, every idiot in area has a gun and thinks they are a hunter. What I will have to be ready for is safeguarding what I'm raising, form 2 legged and 4 legged predators.