HIDALGO, Texas (AP) — As President Donald Trump traveled to the border in Texas to make the case for his $5.7 billion wall , landowner Eloisa Cavazos says she knows firsthand how the project will play out if the White House gets its way.

The federal government has started surveying land along the border in Texas and announced plans to start construction next month. Rather than surrender their land, some property owners are digging in, vowing to reject buyout offers and preparing to fight the administration in court.

"You could give me a trillion dollars and I wouldn't take it," said Cavazos, whose land sits along the Rio Grande, the river separating the U.S. and Mexico in Texas. "It's not about money."

Trump arrived Thursday in McAllen, a city of 143,000 that is on the busiest part of the border for illegal crossings. He toured a section of the border and said "a lot of the crime in our country is caused by what's coming through here."

He added: "Whether it's steel or concrete, you don't care. We need a barrier."

Congress in March funded 33 miles (53 kilometers) of walls and fencing in Texas. The government has laid out plans that would cut across private land in the Rio Grande Valley. Those in the way include landowners who have lived in the valley for generations, environmental groups and a 19th century chapel.

Many have hired lawyers who are preparing to fight the government if, as expected, it moves to seize their land through eminent domain.

The opposition will intensify if Democrats accede to the Trump administration's demand to build more than 215 new miles of wall, including 104 miles in the Rio Grande Valley and 55 miles near Laredo. Even a compromise solution to build "steel slats," as Trump has suggested, or more fencing of the kind that Democrats have previously supported would likely trigger more court cases and pushback in Texas.