In more rural areas, you can still build your own home without a huge amount of paperwork and certification. As someone else mentioned, if your funding hasn't got strings attached you're even more free. Of course there's always the "forgiveness is easier than permission," factor too, but that only works if you're "somebody" to the authorities you hope to be forgiving you.

I built my house from 2003 to 2005 in rural TN with only a couple of permits needed (electrician, one for the well, one for the septic system) and no special laws about what contractors i could employ. This was self-funded, self labor, etc etc as much as possible; and probably about the most benign location for the effort in the entire USA.