It’s not possible to store “6 months of food”. You’ll have friends and family looking to take shelter, thefts, and wealth when improperly managed (How are you going to turn down friends and family at your door?) will expire quickly.
Don’t focus on it. Focus on news ways to get food daily. This includes hunting, scavenging and “other” (Such as my willingness to steal food from raiders and other “bad people”) That way you’ll know your capabilities at just all times.
Do you have any friends who are Mormon? If so get them to take you to the Bishop store. You will be able to can rice, beans and other dry goods very cheap. A $100 dollars of rice and beans will go a long way when other food is not available.
No problem. Use the site carefully. They have a lot of food storage “luxury” items which go way beyond basic needs.