This is how to get your BOL bunker set up for cheap and easy. It's a really simple construction system using dirt and billboard tarps. You could do this even in a very remote location, as the materials required are very lightweight. The basic design is posts, then stucco mesh, then thick fabric (billboard vinyl). Pack with dirt, and once things are settle in, stucco the outside. For the stucco mesh, we use orchard netting, as it's cheap and available. We call this system Rapidobe (rapid - adobe). We made a 35ft by 4ft freestanding wall in 2 days with 3 people. We also built a 35ft by 2.5ft retaining wall in a day with 3 people. For a freestanding wall, you do 2 lines of posts, and then the billboard tarp forms a "U" shape in between the posts, like a big bag. Fill, tamp, tie off, stucco, and you're done. Here's some more information with detailed photos: http://www.velacreations.com/shelter/building-components/walls/item/166-rapidobe-walls.html We'll be doing a barn later this month using this method, and I expect it to work really well, as the site is dug into a hill, and also has some flat areas.