Whether or not you've been following the US Presidential campaign closely, there's no doubt you would've heard at least one or two of Donald Trump's insane campaign promises. 

Arguably the most controversial of them all has been his promise to build a wall between Mexico and the Unites States (which Mexico would pay for) to stop the influx of illegal immigrants. 

If you thought that said promise was just something Trump came up with in the heat of the moment think again. He's still quite serious about that idea and he's even come up with an estimate as to how much it will cost. $8 billion. Which of course should be paid by Mexico (don't count on it Donald). 

When explaining how he came up with that figure (he apparently didn't just pull it from his nether regions) he referenced the Great Wall of China as a shining example of what his project could be. 

“What we’re doing is we have 2,000 miles, right? 2,000 miles. It’s long but not 13,000 miles like they have in China,” he said, comparing his self-declared great wall with the Great Wall of China, which took hundreds of years to build and reportedly resulted in the death of hundreds of thousands of workers. “Of the 2,000, we don’t need 2,000, we need 1,000 because we have natural barriers … and I’m taking it price per square foot and a price per square, you know, per mile,”

Commentators from CNBC agree that the cost would indeed be in the billions but it would be far greater than the sum Trump is suggesting. Though we must not forget Trump's bullish claims about walls when first suggested the idea. 

“I would build a great wall, and nobody builds walls better than me, believe me, and I’ll build them very inexpensively.”

So the wall will be both great and inexpensive. Or free considering he's asking another nation to pay for it. 

Via Uproxx