If anyone has any advice on how I should try to get a solid mortgage or how to leverage my first time home buyer benefits, please reach out.

Paid cash, so no mortgage. 

Where do you get the money to pay for the mortgage for those months it sits empty?

I dont necessarily need to borrow money but isnt it the financial liquidity/situation of the US based/registered company that determined whether banks can/will provide mortgages?

I dont understand why CoC doesnt include the principal part of the mortgage payment.

I don’t want to just do it and potentially commit mortgage fraud. 

I worked with a fantastic real estate agent named Kelly Trageser, who I recommend if you are in the Brevard County area of Florida, and a loan officer, Spencer Howerton, of Satori Mortgage.

Because I bought them cheap at tax sales I have no mortgages on them.

Lenders will qualify you based on the rental income covering the full mortgage payment. 

Most banks have restrictions and a Clause where the mortgage/loan becomes "Due on Sale".The biggest benefit of going from personal to LLC is to protect your assets against a law suit due to an injury or death by someone renting or using the property.