Details have been sketchy and varying so far about the wall with Mexico that Donald Trump has repeatedly talked about building. Stephen Colbert looked at what Trump has said about it and then assembled a panel of experts (architect, engineer, concrete supplier, and designer) to estimate how much it would cost to carry out that vision.
grasshopper says
The Donald will probably go for the lowest contract price, and he might actually get two walls for the price of one if he chooses a firm like this.
Of course, Trump will probably stiff them of the £150.