Your first question when shopping for a smart home security system should be "what's the difference between a smart security ...
From using existing wiring to repurposing old hardware or smart devices, keeping your home secure might not cost as much as you think.
We may earn a commission from links on this page. Credit: René Ramos/Lifehacker/OsakaWayne Studios, Jackyenjoyphotography/Moment, luismmolina/iStock via Getty Images ...