Has there been any studies of pathological "nomad-ness"?
Although not a clinical diagnosis for mental disorder, the term Residential Instability brings up many articles discussing psychological problems associated with it in Google and Google Scholar.

Cotton, B. P. &amp; Schwartz-Barcott, D. (2016). Residential Instability Among Low-Income Families: A Concept Analysis. Archives of Psychiatric Nursing 30(2): 257-261. doi: 10.1016/j.apnu.2015.11.006 pmid: 26992880
Residential instability is relatively common among low-income families and is associated with a host of negative outcomes, especially for children and adolescents. Psychiatric nurses, especially those in the advanced practice role, observe the consequences of residential instability within the clinical setting. Yet, to-date, the concept is somewhat vague and its essential meaning and definition remain unclear.