In my understanding, it's possible to rent a house by the room so I thought it should be possible somehow with the same or a similar strategy. 

It is my understanding the law still allows rental caps at 25% or greater (cap cannot be lower).

It's quite easy to get overwhelmed, especially when reading things on BP forums, as you will find yourself researching many different things that people mention to have an understanding of the conversation if you don't have prior knowledge in the field.

Perhaps more importantly, it helps to understand when seller financing is appropriate.

I understand cap rates are not fixed or mandated to be a strict number. 

I currently live in Charleston and am a fishing guide by trade so I have a good base understanding of how water moves through salt marsh areas, but it'd make me feel a lot better about this purchase if I could have an expert look at it.

I was under the understanding that this would be for an additional investment that would be non-owner occupied.

It's my understanding that a single member LLC doesn't really change taxes.

While I understand the numbers have to fit my agenda, would it be best to look in another state since i live near the NH border? 

It's a small commercial loan for 5+ units, but also, too small to qualify (from what I understand) for fixed rate agency debt?