There is a common floor and roof structure (rear porch/front porch and mechanical area for the A/C compressors) that connect the two units, allowing for the house to be one single building on the property.Your mountain house looks fantastic, just in the few photos you put up, I can see why its in the $195/ft2 range. 

I'm a mechanical engineer and father of four who has decided to really work at real estate investing.

I didn't want to deal with a failed mechanism.

Currently, studying Mechanical Engineering at the University of Central Florida in Orlando I have 6 months left until graduation [with Very little student loans] and I have been bitten by that REI bug.

Not directly real estate related but I work as a mobile mechanic in the automotive industry but only as a contractor.

I break down the mechanics and to show how much money they are potentially leaving on the table and what value the more knowledgeable tax advisor can bring to see if it may make sense to upgrade or not.

You're buying a contract with a known mechanism for crediting interest.I've studied the product extensively, as you apparently have as well.

In the rear center of the building was a mechanical room accessed from outside by him only, between the two units.

You will most likely get a cheap 6-7mm product that has a very weak locking mechanism.

If they were to enforce it with a fine or other enforcement mechanism, they would be sued and a court would strike down the law.