Ok well you could just read the linked article, where it gives specifics:
"Trump also explained how he would force the Mexican government to bankroll a wall along the southern border.
If Mexico refuses to pay for the wall, a Trump administration would begin charging additional fees to Mexicans who come into the U.S. on visas or with border crossing cars -- particularly for visas to "Mexican CEOs and diplomats," which Trump would cancel "if necessary." Trump's plan also calls for possible tariffs and foreign aid cuts and would seize "all remittance payments derived from illegal wages.""
This is perhaps the most heartless proposal I have ever read coming from a presidential candidate. Most of the time, making money to send to their families is the primary motivation for immigrants. Confiscating remittances would not only impoverish immigrants' families but render the immigrants themselves virtual government chattel.
