I have one more year here then hopefully I transfer to either Texas or Tennessee to do my four years of shore duty then I am out.

It would probably help if the story you told was about accessing the equity to purchase further income producing assets rather than fly to the caribbean and buy an Audi.By putting together a small but professional looking package and going to sit down with some community banks in person, I think you'll get a tremendous amount of experience and straight feedback on what's possible or not and why.Good luck!

Just ask yourself how much out of pocket is comfortable to you and just bank on 2 of the 4 wealth generators.

If I’m going the conventional loan route for a 4-plex out of state, do I need to find a lender in the area I’m investing or can my local banks lends for investment properties out of state?

I heard banks don't lend to LLCs so I'm a little confused on that. 

At this point I have a few traditional lenders (local banks charging 4.75-5’ish %) that can close in 30 days.

Call Zoning and ask for Scott or ask to be transferred. 

I'm trying to build up enough business credit and cashflow through my rental properties to get a bank to give me a business loan on storage unit facility. 

I am thinking of having each person buy one property separately and later transfer the title to LLC (to be formed).

I've also have done a little learning about SD Accounts too.I think all of what you said is true but you may have to buy it in your own name them transfer to the SD-IRA account name but you must understand that any profit stays in the tax-deferred account to be income tax free and not penalized.