You might be able to come up with an experimental home and get approval that way. Say you are trying to make a low-cost home for third world countries.
Look into the designs of poured earth homes, and try and make it look 'native'. It might be easier if you are in a desert environment to get approval and make it look good, but I bet you could use some modern, clean, euro design. Or you can go ultra-green. There is a home in my hometown built into a side of a hill. Three sides and the roof are grass covered. The front could be the shot concrete. So, don't try and get around the law, explain why this house would be a good example of how homes should be built. (Insulation, energy usage, fire resistant, bug resistant, sound deadening, light blocking for your mock-up home theater...)
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And I'm assuming you know about using concrete to make bathroom and kitchen counters. You may want to splurge and add hot water heat in pex piping in the floors. I think you could make a decent house for not a lot of money that way. There are a few things like windows, doors, and skylights that might cost something, and the design should look pretty cool.
And go to the library and look at magazines or the Internet for cool architecture designs that you can 'barrow'.
I want that house now.