So the money flows from my traditional IRA holder (like Vanguard or Fidelity), to DirectedIRA (my SDIRA custodian), to now Axos bank which is in the name of my LLC. 

My first location I would go with a mix.  30 wide traditional drive up, parking and cargo containers.

Depending on how much you'll like to contribute to this retirement account keep in mind the self employment taxes you may need to pay of 15.3% and age if contributing to a traditional not roth type retirement account.I agree with the above based on your answer you most likely won't have issues in FL.

Depending on the built in gain and how long you've lived there, you should be able to sell your current primary tax-free and roll any gains from that into your new primary residence, that is IRC section 121.Is there a set amount of time before you can move into the rental as your primary?

If you move your primary residence, he will lose yous tax advantage on the investment property. 

For investment properties sometimes you can do this if there is a history or using Airdna but never for primary residence purchases.

Got an above listing offer in 4 days with someone who was able to get traditional financing through JP Morgan.

This typically means lower down payments and better interest rates compared to traditional investment loans.

My wife and I have been investing in real estate using creative strategies that don’t rely on traditional bank financing, and it’s completely changed how we look at deals.

Convert the Property to a Primary Residence: If you live in the property for at least two of the five years before selling, you may qualify for the primary residence exclusion, which allows you to exclude up to $250,000 of capital gains ($500,000 for married couples) from taxation.4.