@Joseph Lucas Jr,
I am mostly a tax attorney. But have done a good deal of asset protection work for the last 23 years because taxation, asset protection, and especially entities go hand-in-hand.
I think getting out of state series LLC's in AZ will provide you little benefit. Certainly not enough to justify the costs. The costs would arise in the form of money (paying someone like Brian or me) but also hassle, time, etc. In other words, the nice attorney is saying "don't pay me to do this work". Now when a professional is honest enough to tell me that, I tend to listen (and return when I need an honest professional).
At best AZ would treat TX (or DE or NV) series like AZ LLC's. They certainly will not treat them any better than an AZ LLC. AZ would almost certainly be looking to see the TX LLC's registered in AZ – meaning that you'd pay both TX and AZ fees, file reports in both states, etc. There are plenty of Asset Protection Salesmen who would advise not to register the TX entities to do business in AZ. As a legal matter, that approach only works if the TX series LLC’s are so passive as to fall below AZ’s definition of “doing business”…..someone would have to know what you intend to do in the LLC’s and know or research AZ law to give an honest answer. Most Asset Protection Salesmen never bother to do that research or even to mention the need for it. The next paragraph explains why that is.
Another approach is very common with Asset Protection Salesmen: Just don't tell AZ. My issue with that: If local law requires a thing, I think we should follow the law. Goes with having a law license. Don't get me wrong, when the law is grey, my job is to advocate for the best interpretation for my client. But when it's black & white, I should advise the client to follow the law. Further: Most judges & bureaucrats do not take very kindly to people ignoring the law (e.g. – registration requirements) and then later trying to claim protection of the law (e.g. – liability shield). Indeed, such an approach often bites one in the butt later – it's the nature of dealing with bureaucrats and judges. They remember. They judge you – and if they think you are sleazy or deceptive, they will generally find a way to get you. Add to it: Some states are serious about registering to do business with out-of-state entities and penalizing failure to do so. For example, CA denies you access to the courts if you are doing business there and do not register your foreign LLC. OH treats failure to register as a "deceptive business practice" and levies a fine, often of circa $10k. Bottom line: You want the protection of the law, you probably ought to follow the law.
Some Asset Protection Salesmen offer to use trusts to help you hide your foreign LLC from the state where it does business – especially if the state is California (they have insane annual fees for LLC's). But here's the thing: If the target state (e.g. – CA) knew all the facts (e.g. – the trust is a front for an LLC) would they impose a cost (e.g. – CA LLC fee)? If the answer is yes, then you are deliberately trying to mislead the state by hiding behind a trust. Sounds like "deceptive business practice" to me. Not a good idea – even if "you won't get caught". Further: My direct experience with the IRS and with attorneys general is that word has gotten around as to how trusts are misused. Far from preserving privacy, they often attract extra attention. I had one AG put a stack of "trust/asset protection" courses in front of me, state that she had read them, knew that the trusts were used to hide things, and wanted to know what my client was hiding with her many trusts. Ouch.
Not saying one shouldn't use trusts – in an appropriate way and circumstance. But they have so often been abused to hide things…..I'd be wary of using them to hide a foreign LLC from a state where one is in fact "doing business", as defined by that state.
Do out of state entities provide superior asset protection to local LLC's? Rarely, especially if real estate is concerned. With very few exceptions, AZ is not going to follow TX law, regardless of where your LLC came to be. And the few exceptions are very unlikely to apply to you. For example: Derivative lawsuits are often decided in the jurisdiction where the LLC was formed. OK, great. What's a derivative lawsuit? Essentially, it is when the owners of a company sue the managers. Well……for most people on this forum, those are the same people. Gonna sue yourself? Probably not. Bottom line, TX law (assuming that it is better than AZ law) is very, very unlikely to apply in AZ, especially for RE-related endeavors.
Now Brian keeps mentioning the Constitution and the Full Faith and Credit Clause. He seems to think that means that AZ has to follow TX (or NV or whatever) law. Not so. I cited a specific case, which he of course ignored.
In Toni 1 Trust v Wacker, an Alaska Domestic Asset Protection Trust (“DAPT”) was used to try and protect assets from creditors in Montana. The case went to the Alaska (not Montana!) Supreme Court. And the Alaska court ruled (quite unsurprisingly) that Alaska law does not apply in Montana. Who knew? Here’s a link to an excellent, if rather long and somewhat technical, discussion of that case: https://www.forbes.com/sites/jayadkisson/2018/03/05/alaska-supreme-court-hammers-last-nail-in-dapt-coffin-for-use-in-non-dapt-states-in-toni-1-trust/#337a197e62a7. That is how the US Constitution applies – I challenge Brian to show me case law that goes the other way. I have not seen it. Bottom line: AZ does not have to follow TX law, even if one screams “US Constitution Full Faith and Protection Clause” over a Ouija Board at midnight on Friday the 13th. AZ will recognize a TX LLC – on AZ's terms and under AZ's rules.
I don’t see much benefit, and I do see some costs. I’d pass.
There’s more, but this should be enough to guide your decision.