Thanks all... the reason I asked on here was 2 fold; my CPA was out on vacation for the long weekend, (but DID get back to me. She's the best!) AND I see freshies asking similar questions on other platforms and figured it would be a good one for someone to find in a search. ;)
What she said, essentially- NO, moving it into the LLC won't matter (for tax purposes). YES, wait til we are perm residents of AZ as their taxes will be so much lower than if we are residents of CA. And that was something we really care about... that keeps over $15k in OUR pocket.
We already have a great "rent to own" contract we've used before, prepped by our atty. We got a nonrefundable down of $50k and balloon due mid January (the buyer also likes January as he wants to sell some options and needs to have it be in 2022 due to HIS taxes). We will put it in the LLC for the short life of the Rent to Own simply for protection (we will still have 100% control and will continue to rent it out/pay all costs).
We don't NEED to sell this property, so if he walks, we have $50k for doing nothing, so it's all good!
To answer a few other items I saw in some responses:
*The mention of a 1031 has been searing my brain all night! A park model is considered personal property until it is tied into a land parcel. Mine is on state owned land, run by a sub-concessioner. 1031s are exchanges for LIKE, so if I did a 1031, I could exchange it for another park model/mobile home (or 2)??? I always thought it had to be real property, not personal property, but after spending the morning researching this, I MAY BE ABLE TO DO THAT!! I will ask my CPA and atty again, once the long weekend is done. THANKS Doug McVinua for mentioning it! ;) (And yes, we ADORE Arizona!!)
*We don't OWN anything (any more) in CA. Sold all our holdings in 2019 and reinvested in AZ, buying 3 other rentals in various towns. We are here in CA temporarily on a job in a corp rental, but according to CA, not temp enough, (so hand over the tax, chumps). Retiring from this W2 career after 25 looooong years mid Dec. YAY!