Not that it is your need to know but I'll answer your questions.
No need for carbon monoxide detectors, nothing in my house produces excess CM although I do have one in a central location just in case. I do have an alarm and burglary system. I have fire extinguishers in every major room of the house and the closet that is central to all our bedrooms. Yes they are inspected annually (my father in law is a firefighter) And we keep no poisonous liquids in the house proper. Those stay out in the garage up out of reach.
But please don't try and tell me that my families safety is an excuse to justify me having weapons, even if I didn't have those things.
Even if I didn't have kids or a wife I wouldn't need to justify having weapons. The 2nd Amendment is all the justification I need.