The multiple LLC seems to be a way to isolate holdings by state.

I think creating the additional child LLCs in the home states as you buy property is smart to keep the assets isolated from each other... it's my understanding that someone suing the child LLC may be able to go up to the parent, but can't go back "down" to the assets in the other child LLCs

If you know what I mean your "average" Detroiter isn't isolated to just a few areas.

I can isolate apartment buildings and give you a list of names, mailing addresses, building addresses, type of building, and more for each property.

Can the contractor isolate the repair and keep water turned on to kitchen and another bathroom?

I suspect that the results that Mike Quarles shared are not just isolated campaigns.

If new meter doesn't work the local contractor has recommended installing 3-4 isolation valves to help narrow down potential area of concern. 

Once you have that component isolated, you can come up with a plan to structure the business. 

Looking to participate but I have a feeling we might be a little isolated and spread out.

I've been researching funding myself, and isolating it to just locals isn't absolutely necessary, IMO.