I think a lot of people like using the platform since even the primitive sites offer more space and privacy than a 'typical' public campground where you can hear the next guy snoring.   

Advertising an illegal, non-conforming basement for rent, whether publicly or privately, out right violates local laws. 

I didn't try too hard, but again, if somebody has had their hand in hundreds of houses you'd think they WANT a real and recorded public presence. 

To keep my privacy, and my name and address off the public records, I used a registered agent for the LLC.

You should be able to obtain them from the property owner, builder, or public records if they already exist.

The MLS (pulled from public records) shows it as a 3/1. 

In many states, an LLC can keep your name off public records, which is great if you prefer to keep your ownership private or avoid being directly associated with the property.Having an LLC also makes you look more professional.

Bifurcating the asset and operation, putting the wealth behind an "iron curtain" and arranging the public facing side of things in a manner where it is a conveyor belt of throw-away entities with little to no value stored themself, IS a viable approach. 

Mortgage brokers can be helpful as they work with investment property lenders that have better rates and terms that don't advertise directly to the public. 

They'll have it publicly too.Decide if you can stomach non-compliance with a tenant in these scenarios.