As long as the land owners are being compensated fairly take it.
Some don’t want the Wall for ideological reasons.
I say fine, don’t build the Wall there. Funnel the illegals over their land. See if they cry ‘Uncle’.
If not a reception committee can be waiting at those locations.
I didn't get too detailed in the discussions, but IIRC, I think the gov started negotiating at 2X what was considered "market value".
These weren't 100 mile purchases but they were a good size chunk of land and I can't recall any serious complaints from the owners.
Probably easier for the government just to over pay and get it done.
Not like it's their money.