Dome Sweet Dome

Michael Matthews is offering plans for what he calls the "Ultimate Survival Fortress".  I haven't bought it (yet), but it seems to be a fairly standard earth-bag type of dome home.  That said, the price he is asking seems quite reasonable for the knowledge he seems to be providing (and I am not an affiliate, so I am not getting any commissions).  While $1 a square foot is literally a dirt-cheap price for living space, I certainly would not want to make a mistake after putting in dozens or maybe hundreds of hours of heavy labor.