Rich - thanks for posting map.
I did a little more digging and found more info. Not sure if it helps. I always worry about the validity of info given to reporters.
This article mentions finding two pots of money buried in the back yard. So this would be a great place to metal detect.
This article mentions that Sabina Cummings owned 800 acres of farm land somewhere else. Not necessarily with another home site.
Now the interesting part from a neighbor. Her brother died in the same house seven years earlier and they found hidden money, also.
Supposedly, Sabina inherited it.
But did she inherit the house? If so, then we probably should be checking for her brother's name on the land, also. He died ~1912. Or did another family member inherit the house?
On the 1915 map, right where we would think the house would be is a piece of land with Ben Berkley as the owner. Fred's brother? May have to go to the county records to solve this mystery.
Since I can still edit this post, I'll add these additions here.
There was a son-in-law Fred arrested after the murder. But I couldn't find anything about her brother Fred.

Thanks to Jeff for posting this on the Illinois thread.
But I did find a brother Benjamin in the 1900 and 1910 census. Being listed as the "Head", he probably owned the house.
If anyone gets a chance to hunt Ben's land, please update this thread.