Though Brinkley continued to perform the occasional goat gland transplant, in Texas his practice shifted mostly to performing slightly modified vasectomies and prostate "rejuvenations" (for which he charged up to $1,000 per operation ($ in current value), and prescribed his own proprietary medicine for after-care. His business, fueled by radio advertisements and speeches, continued to thrive, and he opened another clinic in San Juan, Texas, specializing in the colon. By 1936, Brinkley had amassed enough wealth to build a mansion for himself and his wife on of land. Brinkley boasted a stable of a dozen Cadillacs, a greenhouse, a foaming fountain garden surrounded by 8,000 bushes, exotic animals imported from the Galapagos Islands, and a swimming pool with a diving tower. Brinkley continued living high in Del Rio, until in 1938 a rival doctor began cutting into Brinkley's business by offering similar procedures much more cheaply. When Del Rio's city elders refused to put the competitor out of business, Brinkley closed up shop and reopened in downtown Little Rock, Arkansas, with another hospital at what is now Marylake Monastery. His competition from Del Rio opened a new cancer center in Eureka Springs, Arkansas, about northwest of Little Rock.