If you are a constant learner as an investor, I'd advise you to consider and check it out of Pace Morby's community. 

In fact, they advised me on how to do it!

Was advised to build credit for 6-12 months from lender but am wondering if there are any other options out there!

Is it advisable to have different CPAs in each state, or should one take care of our entire national portfolio?

Please advise

However, I have a Fannie Mae owned mortgage and the mortgage servicer has advised that Fannie Mae may not allow that "double layered" ownership.

However, you should ensure that the contract language allows for such changes without requiring a full contract re-signing.Consulting with an attorney familiar with Florida real estate and property management law is advisable to ensure compliance and avoid any potential legal issues when making these adjustments.Let me know if you need help with any other aspects of this process!

I imagine this has something to do with taxation, so I would advise a CPA. 

@William CoetThe Hands Off Investor by Brian Burke is a great resource.Passive Pockets is another.Aleksey Chernobelskiy is building an entire business about advising LPs.  

BUT, in my 45 years of real estate investing, brokering, syndicating, advising, I’ve come to the conclusion that investors go in PRIMARILY interested in one or the other.