SpaceX has plans for Texas – but border wall could be barrier to progress

...existing fencing, let alone the proposed wall, cuts off large parcels of land north of the border and renders them undesirable, while tighter constraints on movement of people and goods through legal ports risks severing family ties and hampering economic progress.

 “There’s all this land that is on the other side of the wall that is still in the United States of America,” Gonzalez said. “That presents a challenge. Because there’s thousands upon thousands of acres that have been cut off. Who wants to buy land on the other side of the wall?...
https://www.theguardian.com/us-news/2018/jan/28/spacex-texas-boca-chica-brownsville-border-wall