Sometimes it takes one posting like yours, 2 or 3 years to be found on the internet. You should post information from the 1930 census, so a descendant can recognize something familiar. A descendant is usually curious, and starts looking for their peeps. It just happened to me, so be patient, but don't give up.

If no one has recommended this, look in towns close to the last place you found them, on the census, then fan out. I did this, but you know what happened to me--10 years later--on Ancestry I had already posted all of the deceased names and birth dates. A descendant's grand child of one of his wives, was doing research and attached him to her tree. Fortunately, she responded back to me when I emailed her. She is a cousin.

Now this same ancestor is documented as being married to 5 different women. Just this year I got a 'leaf' alert and it was a death certificate for him. He had moved from Mississippi to Madison Tn, with 2 of his daughters who were teenagers. No SSI information for him, because he died many years before it was thought of. One daughter died in TN, at 13 of Influenza, 2 years after that he died in a fall breaking his back. The 2nd daughter, I think moved to Missouri.

So sometimes it takes a while for a brick wall to crumble. Be patient and look at other people in the family.
The other thing is this Ancestor was a Sr. Sr died before my mother was born, so she didn't know him. My mother and the rest of the family knew Jr., who died in Missouri. I had to tell them this was 2 different people with the same name--father and son.