I have to question Telling it like it is' sources. As I am showing JM had owned & then shared the house in Oak Park with SWM, which was sold and in disrepair years after his death. It was purchased and renovated and put back on the market for 1.7 million. This is not to say that there was not another apartment floating around, although did SWM move into the city after the sale of 647 Linden.
http://chicago.blockshopper.com/property/16064140090000/647_linden/
Sales History
Price Type Date B-Buyer/S-Seller Agent
$650,000 Resale 07/17/2013 B: 647 Linden Inc BA: N/A
S: Sheila Vonwiese Mack SA: N/A
N/A Resale 11/21/2008 B: James L Mack, Sheila Wiese Mack BA: N/A
S: James L Mack, Sheila Von Wiese Mack SA: N/A
N/A Resale 12/29/2003 B: Shiela V Wiese Mack, James L Mack BA: N/A
S: James L Mack SA: N/A
N/A Resale 04/18/1996 B: James L Mack BA: N/A
S: Kaye Clements SA: N/A
N/A Resale 04/22/1992 B: James L Mack BA: N/A
S: Kaye C Mack SA: N/A
Renovation mentioning it was in disrepair:
http://www.oakpark.com/News/Articles/3-11-2014/Reinvigorated-home-is-their-Castle/
Here is the current listing with the walk through:
http://www.zillow.com/homedetails/647-Linden-Ave-Oak-Park-IL-60302/3802838_zpid/
The Oak Park address is also in a police report regarding other Son (?) trying visit his father.
Filing of his Will:
http://www.cookcountyclerkofcourt.org/?section=CASEINFOPage&CASEINFOPage=4220&case_no=2006W007112