From REAL ESTATE TRANSFER section of
News Banner (Murfreesboro, Tennessee) 05 Nov 1930, Wed Page 6
(Now part of Daily News-Journal)
T.M. Carlton and wife to W.G. Cook 10th Dist $125
Sam Haynes and wife to W.G. Cook 10th Dist $210
The purchases are likely where he is living in the 1940 census.
While his neighbor in the census is not SAM Haynes it is a Haynes family.
1940 Census Rutherford Co. TN Dist 10 ED 75-11 sheet 5b
From Ancestry's 1940 US Federal Census database located at
search terms William Cook Rutherford County Tennessee, USA