When to start a LLC?

[Levi Crabtree]

Hey everyone. I currently have 2 rental properties close to downtown Nashville, TN, self managed, and looking to buy more. Class B and I have great tenants that pay on-time and luckily do not receive many call at all regarding issues. Should I start a LLC or wait until I have 3+ properties? I just don't know when it's beneficial to have them under a LLC to get the most benefits out of having a LLC. Thanks for any insight and feedback.