One problem is that stainless is valuable. So is aluminum. Even regular steel has scrap value. The Great Pyramid lost its nice smooth exterior simply because th

One problem is that stainless is valuable. So is aluminum. Even regular steel has scrap value. The Great Pyramid lost its nice smooth exterior simply because the rock it was made of was nice and not easily available in that area. Build it out of basalt blocks in an area with lots of basalt. Low seismic activity, ideally no freeze/thaw cycle, little to no water, and no humans.