You can make your home safer with smart security upgrades that cost less than $50, including smoke alarms, carbon monoxide detectors , fire extinguishers and stronger locks that add protection and peace of mind. One of the most effective ways to prepare for a house fire is to install smoke alarms. Original price: $24.99These window and door alarms add a layer of security to ground-floor windows and doors. READ MORE: Smart ways to prep your home before a major snowstormBeef up your indoor security with a Ring camera. Standard locks work most of the time, but if you don’t want to take any chances, these door reinforcement locks add more security.