Many home builders move existing cactus from a new area of land they are ceveloping to an area they can live while construction is taking place. Later the moved cactus will be re-planted in the yards and parkways of the new neighborhoods. Ocotillo Cactus is also re-used
Here are many dozens of Barrel Cactus that were moved while construction takes place
Barrel Cactus of many sizes and shapes planted in rows