Harper Homestead in Alvarado TX

I am taking a wild guess on what year this picture was taken. I chose 1928, because that's when my dad, Hershel R. Harper, Sr. was born. He is the youngest of 6 (4 brothers & 1 sister). My grandfather, Wade Lee Harper, had been married previously to a A. Emmaline "Emma" Wiggins who had 1 son, William Bradley Harper (named after my great grandfather) and 2 daughters named Esther Lee Harper & Ruby Harper who I don't know if they were still living at home or not. In 1928 Bill would have been 27yoa & single, Esther-24yoa, Ruby-22yoa.