Only in “some” Connecticut towns? There really is a problem here.
Every household should have:
For every adult:
1 .45ACP combat pistol
1 .308 battle rifle
1 12ga shotgun
For every child over the age of ten:
1 .22LR rifle
1 .22LR pistol
1 .410 shotgun
Plus whatever hobby and collectible firearms they might find useful - hunting guns, target guns, etc.
instead of the .410, I’d recommend a 20 gauge...
I’ve tried shooting clays with a .410, couldn’t hit a one (I was used to a 12 gauge).
The 20 doesn’t have that much more kick than the .410, and has more “intruder knockdown” capability, and can be used by the females in the family regardless of age (over 10, as you suggest).
For every adult:
1 .45ACP combat pistol
1 .308 battle rifle
1 12ga shotgun
That might be an ideal, but :
1. Not everyone can afford that,and ammo.
2. Anyone uncomfortable, for whatever reason, with a particular firearm, should not own it, except with the purpose of learning to work with it.
3. Some households have a drunk, immature or person(s) otherwise unsuited for proper use of a firearm (or pneumatic drill, or chain saw, or sub-compact car). The other peoplle in the house are the best determinant of who they are.
4. If you are not going to give the tools the practice and attention they deserve, wait until you are ready to do it right.