This map may offer more concrete evidence of Michael Kelly and Matthew Tatarian's business model. This map, created using SEMCOG and City of Detroit Assessor data, shows the properties owned by Kelly and Tatarian, and notes whether the properties are within 45' of a parcel owned by the City of Detroit, the Wayne County Land Bank, or a local non-profit. (I excluded the State of Michigan, Wayne County or the Federal Government because these governments do not usually collect property for parcel assembly- rather, they usually focus on disposition.) I chose this distance based on the distribution of street widths and lot frontages throughout the city - nearly all of the city's lots are between 30 and 40 feet wide. Using this metric, a 45' radius includes properties adjacent to, and two doors down from, a Kelly-owned property without including properties further away. Similarly, this radius includes properties across alleys and streets, without including properties across both a street and an alley.
Clearly, this map suggests that Kelly and Tatarian seek properties in areas near properties owned by non-profits and property-assembling governments. Nearly 75% (1048/1405) of properties owned by Kelly and Tatarian are within 45' of city- or non-profit-owned properties, about twice the rate for other properties.