The material is coming directly from Trump's website:
So, to sum up, on the first day of a Donald Trump presidency he will start a trade war, damage diplomatic ties, and massively increase the size of government by adding new bureaucratic red tape and confiscating the earnings for/of millions of Mexicans living in the US legally and illegally.
Personally, I find this position to be one of the more short-sighted and oppressive positions. First off, he will be burdening the already over-burdened, and under-funded Treasury department with the burden of enforcing this policy. Second, he will be garnishing the wages of hard-working individuals in an attempt to extort the Mexican government to pay for his fence. That's like me stealing my neighbors mail in order to extort him into paying for my fence. Sure, his dog pees on my yard, but it is my yard and my responsibility.