Not doing any major structural work, just some walls, electrical cleanup, furnace replacements, roof, kitchen cabinets, and carpet/paint aesthetics.

Brandon Turner has said a few times in the podcasts that getting legal help outside of in an actual legal battle is relatively inexpensive so I'd like to see what kind of help I can find.I need someone who can help me establish an LLC structure that will keep my family as legally immune as possible as we're starting an Airbnb empire.

One idea that came to mind is to start your REI meetup and have the first several meetings loosely structured around one of the most influential real estate books you have read.

We've talked to our friends briefly about owner financing and they're amenable to it, but I really don't know anything about how to structure this type of deal and I'm looking for any type of suggestions from people that have done this.

I can refer you to someone who is if you need advice on how to present and structure this. 

Any pointers on how to structure this?

The Zone A area comes into the property, but not onto the structure itself.

The main concerns with a house built before 1900 would be structural and sewer.

I wrote 2 posts that I think might be helpful to your questions here - The one on delayed financing (and how to structure your deal better) can be found HERE.The one on what questions to ask lenders (and how to find the good ones) can be found HERE.Let me know if you have any other questions. 

I was most afraid of buying a property with major structural or foundational issues that would sink me financially.This property was actually an off market property to begin with that would not pass city inspection when we first saw it (at least on the side I am living in).