Back when Y2K was a big concern. i had a box with a long barreld AK with a bipod and a few hundred round drums, with that I had four SKS, another AK rifle, a couple short barreled 12 ga pumps and enough ammo to feed all of them. My thinking was to have enough firepower to hand out to man a wall that ran around the Condo complex. I talked to a couple of my neighbors, one was a SEAL about it when the topic came up over beers. They commented that they would be good back up but they would use their OWN guns and ammo. We also figured that we could not agree on who if anyone would attack us. I have never lived in a place where i was afraid of a riot. Since then I sold off the spare AK and all of the SKS rifles. I look at it as I need what I need and have more than enough to wait out any problem, and have enough ammo for each gun from 22LR to the 375H&H to load every gun 5 times if not more. If friends or neighbors come to me asking for help I can do it. But I don't think I will go from door to door and hand someone a kit of Long gun, hand gun and ammo making a neighborhood malitia.
Now when it comes to family you may want to look at what you already have and see who cna shoot what and who you want to have a gun. A single shot shotgun or 22LR that you use for hunting will make do and deter someone to look for an easier target. My father only has hunting guns at his house. I would not feel under armed with his deer rifle, pump or semi auto shotgun, or even his 22 tree rat killer.
Heck even his full auto BB gun would deter someone from comming up the front stairs and go look for another easier target. Also when it comes to family. How do I say this. My father would argue with them and not shoot. My uncle would say "get out" count to 3 and follow it with well aimed rounds. I guess you need to know what your family members are willing and able to do if given a gun.
What was that little 45 single shot pistol they dropped all over Europe in WWII the Liberator? It was designed to shoot a single round and you needed a pencil or rod to eject the spent case. But it was there to get a better gun. Your single shot shotgun, Black powder handgun, or other hunting gun may yield you a Pump semi auto shotgun, a rifle or a handgun of someone comming to raid your house.