Not as much as one might think, https://www.boxculvert.com/price/, but there would be the hassle of digging and placing it. Then the entrance has to be made. I think hempcrete blocks might be easier and more versatile for DIY.
You could put a pad down and bolt the culvert to that to anchor it. It you set it into the side of a hill then backfill, you could almost use any type of door - sliding for light, but we are talking security so unless you camouflaged it, it could be vulnerable. It would be like a hobbit home. 😀 I personally think a culvert would be ideal and you can stand up in them too. While atlas are great, only the wealthy can afford them.
It does look very sturdy. Not everyone has a hill, though. If it was for the average backyard, there would have to be steps down. This would be even sturdier, I think, although the rolling potential is worrisome. :) https://www.youtube.com/watch?v=qX7sAzB0HEE
Not as much as one might think, https://www.boxculvert.com/price/, but there would be the hassle of digging and placing it. Then the entrance has to be made. I think hempcrete blocks might be easier and more versatile for DIY.
You could put a pad down and bolt the culvert to that to anchor it. It you set it into the side of a hill then backfill, you could almost use any type of door - sliding for light, but we are talking security so unless you camouflaged it, it could be vulnerable. It would be like a hobbit home. 😀 I personally think a culvert would be ideal and you can stand up in them too. While atlas are great, only the wealthy can afford them.
It does look very sturdy. Not everyone has a hill, though. If it was for the average backyard, there would have to be steps down. This would be even sturdier, I think, although the rolling potential is worrisome. :) https://www.youtube.com/watch?v=qX7sAzB0HEE
People are clever!!