Not to detract from their efforts, but you can build sealed storage containers under ground that are much easier to heat and cool and are entirely fire-proof. A 9ft x 40ft A-rated storage container is about $6k to $7k. You have to get permits and it has to be on an inspected concrete slab, but then you can seal it with high pressure concrete. The entrance is elevated for flood avoidance. This can be done in a month or less not counting time to get the permits. And before anyone says, "live in a box?" there are many examples you can find on Youtube of beautiful comfortable luxurious homes built in this manor. It is becoming very popular.