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

We are a small partnership with 4-5 properties currently, but we are growing and hoping to find a reliable lending partner that we can do repeat business with.About 3 months ago, we successfully completed a BRRRR deal where we had excellent numbers, over a 1.25 ratio at 75% LTV, our guarantor partner has an 800+ credit score, and we had no issues qualifying for the loan.

Do you have a Facebook business page?

All businesses can hit speed bumps during any growth period. 

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

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.

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

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