When to start to LLC

[George Calbert]

BP Family,
I am in need some advice if I should form an LLC now or when I return to the United States. My scheduled date to return is summer 2017 timeframe.
I am in the Navy stationed in Japan, I own a SFH in WA State. My goals right now is to start saving for REI and educating myself.
The SFH was my primary residence until I transferred to Japan in 2012. I am renting it out with a property management firm. I am negative cash flow on it. Are there any tax benefits that would be beneficial for me to start an LLC now. If so, are there any recommendations on where to form LLC at due to me being overseas at this time? Or should I wait until I am ready to pull the trigger and start my REI.
Thanks
George