Should I create my LLC before my first deal?? Pros & Cons

I have made the decision to get out of the rat race. I have convinced my wife to get on board with me on the way to financial freedom. 

I am almost ready to purchase my first deal. However, I don"t know if I should create my LLC first or should I purchase the rentals in our names and once we are more established, we can then move our assets to the LLC.

José