They exist, but they are rare, and usually in rough parts of town. * That said - housing is MUCH more affordable here than in Cali.

What the OP has done IMO is create a situation where none existed before.

One big issue standing in my way is he has a mortgage on the property and I have not really seen the process of a lease option being done with a house that has an existing mortgage.

Hi All!I’ve got a brother currently under contract purchasing a foreclosure property in the small town we grew up in. The property is owned by Bank of America and has a fixer upper home in the front with a mobile home...

The best bet is to 'follow the bread crumbs' from existing connections. 

Google their names, does this Ark Encounter Conference really exist? 

I would see no issue with renting out the master bedroom and moving on; I've never had a problem doing that as long as you find someone who can get along with your existing roommates.

Studio fourplexes barely exist in any of these areas, but a fourplex of one to two bedrooms that needs renovation might go at that price.I'm not sure that you are correct that most people use Airbnb in small groups.

And it doesn't move linear like when you're purchasing an existing Facility, but 3-Dimensional - any potential change in one aspect of the project will have repercussions throughout the entire project.  

PPM start with "Private" and the law favors those with a pre-existing relationship.Depending on which 506(c) exemption your PPM takes, some of the ideas you listed are a violation of the law and could get you in serious trouble.