There are different issues here.
(1) You should always use the state of the real property to hold the title to the real property asset. If the property is in AZ then create an AZ entity.
(2) If you live in California, and you are affiliated with out-of-state companies (manager, owner, etc) then CA wants to tax that because hey, they can. If you want to live in their system then you have to play by their rules. Get a CA attorney to guide you how best to set up this portion of your company. But I still think you should create the property-owning company differently because it’s not in CA but in another state per your question.
(3) For setting up an out-of-state LLC there are a hundred companies out there that will guide you through this process, for a fee that varies according to how much hand holding you need. You need a “registered agent” in a state to receive registered corporate legal mail but typically you have a lawyer involved in your closing anyway so you can have them do it as part of leadup to closing. Or you can have these companies do it for you as they become your “registered agent” and forward all the correspondence going to your “registered agent’s address,” again for a (minimal?) fee. Normally your mail would come to your park manager or your PO box…so the registered agent is really for legal snooping/sleuthing/official business. As long as you deal with the registered agent, you can usually file the LLC creating document on paper or online with (another) minimal fee. The paper filed with the SOS “creates” the LLC but it doesn’t “mean” anything except what the LLC Agreement says it means. Mostly.
(4) You would be crazy NOT to talk to an attorney about your LLC Agreement which governs what is supposed to happen inside the LLC and among the partners of the LLC. This is an “Important Document!” But you don’t need to pay the attorney $200 per hour or more to set up the LLC itself. It depends how cheap you want to be. If you know what you are doing you can do it yourself, but, as with all things, if you don’t know what you are doing you can shoot yourself in the foot.