I have attempted to contact some of the descendants of the siblings listed in the 1930 census but so far, haven't gotten any responses. That's why I have reached out to the message boards.
I have all the information that ancestry.com has to offer regarding this family, but it appears that after 1930, John B. Mons just disappears.
I found that his young child who passed away (Wallace Mons) had an unmarked grave. I just have so many questions about John...I would love to find someone related that knows more about him after 1930!