Well my two cents may not be worth much. . . .but I would start with the basic items first. You and your husband have a family to support and your family is your number 1 priority. Water, food and shelter would be first. Having a life straw for water would be good to have, especially if you plan on leaving your home. Honestly, I do not have one of these even though I should, but I am not planning on leaving my homestead long term ever. We have county water for our home but also put in a water well to water the garden and animals too. The one time our county water got shut off due to the floods of Harvey, I ended up boiling our well water for drinking just to be on the safe side even though it is normally 'good'. It was also nice because I could still do my laundry, washing dishes, flushing toilets and ourselves without much concern.
You say you have extra food at all times, but how much is your extra? Is it a couple weeks? A couple months? I honestly have a couple years worth. This has been a labor of love for me. I started a garden the spring after we moved into our homestead even working a full time job at the time so it was on a much smaller scale than what I do now. Since you have a few in your family, I would want to start there. Make it a family project. It's always exciting to find something new growing. . . . even my husband who does not often like to "help" still likes to hear what is new out there so he can tell his buddies. . . It was easier when the boys were still living at home and took an interest. Now that it is just hunny and I, it is mainly just me, but I do mot work the hours I use to and am more part time going in when scheduled and if needed for extra hours. This season has been the first hunny has 'helped' in years even helping plant corn and spraying my walkways to prevent weeds. Think even the pandemic has worried him some. I would definitely start a garden. That was actually my first. . . .
We have since added in our critters like cows, goats, pigs and chickens. I am taking a guess here and think you are in a city or suburb? Some city ordinance allow chickens. you just cant get a roaster so check. You could get eggs on a daily basis. Even if you cant use as many as produced everyday, you can preserve with either dehydrating to make powder or using a slake lime/water solution. They are also a great meat source. Not for frying because farm raised or at least mine are better boilded. ZThey tend to be tough otherwise in my opinion. If you can have the bigger livestock I can go into that too.
Shelter is my current property so I would look to someone else who is planning on bugging out. Yes we have a tent and camp stove but we have only used these on occasion when the boys were young and we went camping for fun.+
