I think it sounds like a great idea! I would go with the gravel floor and the tank roof idea sounds like it would work fine if you can find a way to keep the water from leaking in around your roof/ walls seam. Keep us updated.
yea this is not only stupid ( which is the politest word for what I am actually thinking) but it would make it nearly impossible for anyone to grow there own food and sell the surplus. It would make farmers markets with local growers and raisers unattainable and super farms with lots of money to...
I very rarely buy new clothes for myself my little guy is growing so fast that it seems he gets new clothes once a month. 99% of which come from sal val. When I get new clothes they come from sal val too. :P