Jazz wants to know what a good option for DIY home security is? Leo says that SimpliSafe (a sponsor of the TWiT Network) is the one he'd recommend. RING is getting into it, but they are late to the party. Simply Safe also has cameras now, so it's a very good all-in-one solution.
Another company worth looking at is WYZE. They are new to the home security game, but they are VERY affordable. Check out The Wirecutter for their reviews.