Your post is beautiful and historically interesting, but most of the references for the addresses you share ain't worth much. Radaris, for example, is not a viable source of information. You are not using the proper ressource to find the actual owner of the properties you put out. Use the following public web site (like I did a while back to verify the claims of Yoichi Shimatsu) and you'll see there is no correspondence between what the private web sites tell (might be a collection of all the adresses Alefantis ever lived at, liked someone suggested was the case for him in a Radaris review) and the official names of the proprietors.

https://www.taxpayerservicecenter.com/RP_Search.jsp?search_type=Assessment

Let's take the first address:
3334 N ST NW; WASHINGTON DC 20007 is owned by a guy name William B. Broydrick

https://www.taxpayerservicecenter.com/RP_Detail.jsp?ssl=1220%20%20%20%200081