That is not good.
The earth ship project in America was also years of fighting the government.
Now they have permission in a state on like a trial base as I understood?
One thing the government don't want you to get self sufficient, they can't control that.
I'm sad to hear that there is no future for you in Portugal.
Can't you trade the land with a farmer or something? Apply for a exeption? Isn't it a hidden fault you bought the land for building something on it. In the Netherlands you can get your money back if it was known and the seller kept it quiet.
Plans to move some areas to not building areas takes years to go to governments I believe.
It's a pitty you are in this situation while your intention was good.