Only relevant part is this:

> Cost estimates for the Golden Dome program range from $175 billion (White House), to $1.2 trillion (Congressional Budget Office), to $3.6 trillion (American Enterprise Institute) depending on the architectural details. The wide range largely hinges on the number of space-based missiles and the cost of replacing satellites whose low orbits decay quickly due to atmospheric drag. Some $24.4 billion in federal funding was directed to the Golden Dome in the One Big Beautiful Bill Act in 2025, with another $13 billion allocated for the fiscal year 2026, totaling 2.2% of the federal discretionary budget during that year.

It's just a ploy to transfer more public money to government contractors and friends, like Musk.

I recommend reading the paper by Parnas about the original SDI system.

https://web.stanford.edu/class/cs99r/readings/parnas1.pdf