FHA loans are designed for primary residences and require the borrower to be an individual, not a business entity.

Do you have a Facebook business page?

Would that lower our tax liability from other income we receive or no because this is purely RE and not an operating business?

As you progress your bookkeeping business, you'll likely want to learn how to export statements from a variety of property management platforms, as investor books are housed in bank accounts, spreadsheets, and a variety of property management and accounting software!

I’m pretty handy with tools and business minded.

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

Full security deposit for a three month MTR is causing me to lose business and I need an alternative! 

I would greatly appreciate any guidance or advice starting off with this business model.

Now you are telling me my critique of of your business model "gives you motivation".

You're running a business and when you proactively do so, your tenants will know that you're holding up your end of the lease - and if they don't, they don't stay.Hope this helps.