I just just checked the detectors and purchased a few new fire extinguishers. I had that same thought- why spend cash on security then have my house burn down for want of a $20 tool!

Cameras are probably going to happen for me down the road. I thought it prudent to beef up the physical infrastructure a bit first. They are cheaper than they once were. Something I can network and monitor from my PC would be ideal.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman