How the fetched Omni model is framed
Omni presents this page as a high-level construction-cost simulation built around precast reinforced concrete wall elements. The article explicitly states that the model relies on simplifying assumptions and concentrates on manufacturing, transport, assembly, guards, and maintenance.
Assumptions taken directly from the source article
The fetched page fixes several planning assumptions in plain language: a 40 ft wall height, reinforced precast concrete priced at 350 dollars per cubic yard, average transport distance of 150 miles, transport cost of 4 dollars per mile, guard cost of 149,369 dollars per year, and maintenance at 15 percent per year.
This Solveyan version's cost model
Because the public Omni article describes the assumptions but does not publish every hidden geometric constant, this implementation keeps the same source-backed cost buckets while exposing an equivalent wall thickness and burial depth so you can audit the concrete quantity directly.