Leaving phone out of reach

I used to turn it off as well, until one night my son ran into some trouble and noone could get ahold of me. Since then, I have it on do not disturb from 10pm until 7am, with certain family members or friends on my favorite list so in case of emergency I can be gotten ahold of.
I talk with my kids via messenger (they don’t have actual phone plans)
I’m thinking I need a land line or dedicated house cell phone.