I am building a storm shelter in my backyard. It will have a compact staircase from floor level in the home (2' crawlspace), access to staircase will be via floor trapdoor. Once down the staircase their will be a 20' hallway to the shelter. I want it approx. 400ft2. It needs a bathroom (shower not bath), a bedroom with a full bed and dresser, a kitchen (propane stove?), living room with couch, coffee table (50" tv wall mounted), storage room. There will be a in-floor safe in the bedroom. I want everything made out of reinforced poured concrete. The structure needs to be at least 10' underground to roof (10' of dirt above roof). I live in North Central Alabama. Power will be mains supplied with battery backup / solar on main house. Water will be mains supplied, storage tank integrated into shelter. Needs air ventilation system. I will be putting a vault safe door (normal door size) on the shelter entrance. I need a design, layout, 3d model, and structural blueprints.