Specifically Nevada protects you from identity, state tax for some amounts (you simply pay state tax on your salary from the llc), it has "a corporate veil that is very hard to pierce" discouraging people from coming after you with law suits.

Too many ways for decent attorney to ‘pierce the veil’ when you convert later.

Hello BP, i'm working on my fist wholesaling deal here in pierce county washington and i came across this property that looks like its going through probate.

Piercing the veil of a corporate entity isn't that easy if set up correctly. 

For the purposes of your question, if the LLC owns the business/storage facility/management company, the only way any of you can be held personally liable is if one of you personally guarantees the loan or if the corporate veil is pierced.  

As far as the liability protection, as long as we maintain separation in transactions we provide no basis for “piercing the corporate veil”.

A judge will pierce right through that stuff in a court room .

My original thought would be that a law suit couldn't pierce the IRA and if all of you're planning to put all of your properties in the same LLC it might be overkill on protection as in if they take the LLC's assets there's nothing left to protect inside your IRA. 

I did Flips in Seattle, King, Snohomish & Pierce counties for 20 years.Find a Real Estate Investment group to join.

@Sandra Evans ignore the advice that tells you to sabotage the showings - that only prolongs the agony and you risk a bad reference from your current landlord.