Business justification of LLC-B --> This is can be a problem.

Most businesses, property management or not, fail due to the lack of sales, not due to the lack of systems and phone etiquette.

Is the mid term rental business that you have a 'rental arbitrage' business?

Which is a tax when you do an active business in your IRA but it is essentially the same thing. 

@Jacob HavlovickBigger Pockets is a great place to find a real estate tax accountant.A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

Here is what the IRS says on the subject: Election for Husband and Wife Unincorporated Businesses A business owned and operated by the spouses through a limited liability company does not qualify for the election Only businesses that are owned and operated by spouses as co-owners (and not in the name of a state law entity) qualify for the election.

Two are for businesses, one for commercial property, one for residential property.

So thats the reality from my point of view I made a business out of this for many years and my dad made a business out of this in the 70s through the 80s so lots of experience at it. 

Unfortunately, the only guarantee in this business, or any business really, is there are no guarantees of outcomes... ever.  

Even if you create a non-CA LLC, if you are managing the business from California, you will likely be deemed to be "doing business" in California and therefore likely subject to CA taxes.