This is the best fast-food version of Tex-Mex in town. The prices also aren't that much more than Taco Bell's. Chacho's is a small, privately owned San Antonio-based chain with a fascinating marketing premise. It uses higher-priced ingredients but keeps the cost of the food low. In order to make a profit, it has to do huge volume - which it does. If the high quality of the tacos is surprising, the number of people eating there at any given time is astonishing.