I can't help but to think that bunch of identical multi-families clustered together would breed a "rent war" in which the only winners would be the tenants.

So my question is, would this work be considered permanent improvements since the Code of Alabama states, As used herein, "permanent improvements" shall include, but not be limited to, all repairs, improvements, and equipment attached to the property as fixtures.

Too big for a tenant to tackle with basic equipment.  

There are a gazillion threads identical to this.I'd suggest a quick forum search and you'll see plenty of suggestions.At the end of the day it all comes down to YOUR goals, experience, resources, etc.

Yes, by a NACHI-certified home inspector equipped with a thermal imaging camera.

That is almost identical to what my CPA and Attorney said.

It seems like a fourplex surrounded by other (almost identical fourplexes) selling for about 50-60k more.

The value here is in developing in identical neighborhoods that are adjacent.I demoed the two homes that were there when I bought the dirt.

This is two identical 3/1 units sharing a center wall.  

Equipment, water softening systems, etc.