This way if anything ever does happen, you will be able to guard your property against trespassers, burglars, and anyone else who means to do you or your family harm. So, if it means spending 0 on a few bullet security cameras than that is a small price to pay for peace of mind.
Most likely, you have emotional wounds that must be healed before you can contact your ex and take actions to save your relationship. Taking a month away from your ex will offer you enough time to recover emotionally from the breakup. Resist every temptation to call your ex, email them, or contact them in any other methods during this time. I know you’re worried, but your ex will not forget about you in a month. Intimacy takes time to build and fade, so a month will not be enough time for intimacy to go away.