This is another example of compressing time: Brinkley maintained a home in Milford for quite some time after he built XER. (If you look at the photo caption here, it references Kansas.) He also kept the Brinkley Hospital in Milford open, letting other people run the operations and surgery, while he built things up down south. It wasn’t until late in 1933 that he finally left Milford for good, bringing over 30 employees with him, setting up the new Brinkley Hospital at the Roswell Hotel and buying this massive estate in Del Rio.
This “remote control” setup, which was just a fancy phone line, actually allowed him to broadcast from Kansas to Mexico! (Also see note 183 on how the citizens of Milford felt about Brinkley’s abandonment of their town!)