Thank you for your feedback. I chose the mixed construction for texturing and because I have always found Sathium easier than crushed rocks in large quantities. That being said I was also asked a more affordable version of this base and I might make an armored concrete version with less windows and just the bare essentials. I will post here if I go ahead with that project.

Cheers,

you could go fully armored concrete and lower to the minimum the sathium cost