My opinion, go to Tony Robbins or your choice of speaker If you are looking for a high energy motivational seminar.

Quote from @Trace Adams: Before you pour too much time/energy into this, I would verify with the city that this is permissible.

So from my experience here is what you can consider: Having a reliable technician or two on standby for unexpected issues. 

@Yosef LeeWhat energy AND humility you show!

If they're any good, they will take down any deal they find themselves or send it to a preferred list of people they have already been working with, who they trust to respond quickly, close reliably, solve problems effectively, and be pleasant to work with.You come across as rather arrogant in your posts.

Concrete- 25% energy cost to convert limestone to cement, 25% for transportation costs, As fuel costs go up, concrete cost goes up.  

I'm starting to lean towards this having enough problems that despite the massive monthly cost savings, this program just is not consistent and reliable enough if this is your business instead of a hobby.

It's worth consulting a local attorney or using a reliable legal service to ensure it complies with state and local laws.

To me the quadplex would be dual purpose, while you are not living there it serves as a reliable stream of income, once you move there, you could live in 1 of the units while you build your permanent home, and you could also use it for when your family comes over for large gatherings.A 2nd option might be to build an RV park, Unless their are zoning restrictions, you should be able to build one fairly inexpensive, with a septic system and either public water or a well, you can keep your costs to a minimum by doing gravel roads, which are easier to remove later if you don't want them. 

I am giving you reliable advice.