Here is what I know about August Henry Balko, Jr., the caretaker of Beth Sarim. His father, August H. Balko, Sr. was born in Germany around 1850 and arrived on October 16, 1873 to New York, and subsequently moved to La Grange, Fayette, Texas where, on December 21, 1887, his son August, Jr. was born. August Jr. also had a sister named Patty. By 1910, August Sr. had moved to Longworth, Fisher County, Texas, whereas August Jr. (now 22) lived at 3150 Beauchamp Street in Houston, Harris County, Texas, and worked as a clerk for Producers Oil Company. He was already a Bible Student by 1917, for in this year he submitted his draft card for the World War with the following exemption: "Millenium Dawnist". I have a copy of his draft card if anyone is interested. Then, by 1920, August, Jr. had moved back to La Grange, Fayette, Texas, where he lived in a boarding house and worked as an agent for a railroad company. The following year he married the future Blanch P. Balko, and they lived together in Texas before giving birth to their first child, Bonnie Balko around December 1929. Then by April 1930, they had moved to San Diego, California, to live at Beth Sarim where August, Jr. worked as general caretaker and Blanch worked as a cook for her family and Rutherford and his entourage. Within a year, the Balkos had a second child, named Joseph Balko. After living at Beth Sarim for an undetermined time, August Balko Jr. moved back to Harris County, Texas, and died on April 15, 1973.
I'm not very sure about Blanch P. Balko's background. One possibility is that she was born Blanch Post, born around 1904-1905, and who lived on a farm in Central, Jefferson County, Missouri. But I have no corroborating evidence that she is the same person as Blanch P. Balko.