I don’t know if I could fit all my kids in that vault, but I’ll give it a try. ;)
Seriously, I’d feel a lot better protected with quick access that is safe from any wrong or little hands. This neighborhood and others like it in the country have been targeted and “owned” by specific south LA gangs, 20 miles away. For real.
I assume you have pistols. Why not just get a holster and carry around the house? I know it’s weird but I do it. My sons are older and well trained. I even took my 14 year old to the range last year for his birthday. He did really well with my two Ruger 9’s. I’m glad he knows how to use them in case of emergency. My 12 yo is trained not to touch it. Still, if there is an immediate need for it my pistol is with me.