Question on LLC for Investment Properties

[Account Closed]

Hi everyone,

I hear many RE investors who have several LLCs for their properties. Why do they do this and what benefit does this give? 

Let's say, hypothetically, I own 2 rental properties. 1 in PA and 1 in OH. Should I put them under an LLC?

Now let's say, I have 20 rental properties, in PA, OH, NY, FL, AND TX. How would an LLC work in this situation? Do I open a LLC for each property or LLC for each state or just 1 LLC which holds all properties?

This is just a question I had after I researched several investors who do this. 

I want to be prepared when I start investing, which will be very very soon.

My goal in terms of RE, is to Invest and build a portfolio of residential/commercial properties, AND start developing.