I was going to say the exact same thing. And lets be honest in most situations that you may encounter in terms of defense if you are a surviving right the .22lr can still be used as a weapon. Its quiet to the point it wont attract much attention accurate 100+ yards still and convient as far as ammo, etc.
But yeah there are tons of ideas, but my best advice is have fun, plan a budget or just how in depth you want to go with it. Then stretch it as far as you can. I'm not rich and have a lot of other priorities in life to so I have to take it slow on supplies.
I first started with a basic emergency kit, some food, water, waterproof matches, emergency blankets, compass, flashlights, etc. Spent well under $50 to put this together as I grabbed a lot of stuff around the house.
Now I'm planning my bug out bag(s) one for each car. Will have a lot of the same stuff but in a convient bag that I can carry for a distance and obviously leave in the cars.
Firearms are under control too. Depending on the amount of time, who I will be able to be with or if I'll be by myself, and if I can load and take a vehicle obviously changes alot.