Steel ammo cans can be purchased at any surplus store and many outdoor/hunting stores. They will protect from lightning as well as electromagnetic pulse. They come with a rubber gasket making them waterproof, but they are not fireproof - if your house burns down around the ammo can, the heat will destroy your drives.
So, if you are really paranoid, get a fireproof safe big enough to store the ammo can...
The radio was something I had built myself from a kit in the summer before my freshman year at high school.
Doing something new or unique for your project is praiseworthy; something people have done for decades with mostly off the shelf parts, not so much.
consider this to be a good thing. For the very reason:
Peter Leyden, director of the New Politics Institute political and new media think tank, said that YouTube video represents "a new era, a new wave of politics
There is no time like the present for postponing what you ought to be doing.