I own a small remodeling and construction company here in Iowa.  Although demand for tiny homes is not huge here YET,  I can foresee it in the future.  I am working on some plans to slowly break into the market and take off with it.  Perhaps we can share motivation with one another.  Please follow me, as I am already a follower of you.

love the tiny house movement
it's amazing what you can get if you are willing to live.. a more simple lifestyle

I love your design and the other ones that you showed. Well done and UPVOTED. 
I just wrote an article about beautiful trees. Please have a look but only upvote it if you think that it is deserving.
http://steem.link/7VCcv

Diggin' these designs, @benjiberigan ! Wish you all the best in your Tiny Home journey.

As I came to find out myself, though, the structure you ultimately end up with is largely dependent on navigating your way through (and in some cases, around entirely) the government building and zoning codes you mention above. For example, it was long held in the "Tiny House" community that simply putting a home on wheels was a way to get around draconian regulations. 

But that's simply not the case everywhere, all the time. In my own experience, I actually found that there were <em>more</em> hurdles in living in what my Township deemed a "Recreational Vehicle" than there were if I built the same home without wheels, what they called a "Hunting Cabin" (any structure below 500 square feet used for living).

The property tax difference in building a State-sanctioned "dwelling" vs. a "tiny house" are drastically different, too. (The latter is much lower than the former).

It's tough to keep straight. I'm planning on writing a book "Open Sourcing" the methods to deal with such government codes and how best for people to get around them, as the attempts at doing so thus far simply aren't satisfactory or thorough enough to be useful.  

Consider all these factors while you design your home, as it's a major disappointment to be on the cusp of construction and have to go back to Square One entirely (been there, done that - learn from such mistakes!)

Hopefully it will help people like yourself in the future and can't wait to see what other tiny home stuff you post going forward.