Low-income earners have a greater potential to be impacted negatively by professional and residential instabilities. Along with the various structural changes, urban sprawl and improvement of speed potentials caused an increase in commuting time. As a result, 5% of the low-income workers in Marseille and Barcelona allocate more than two hours a day to their daily travel routine. These changes may have facilitated the practice of “spatial reversibility”, that is to say, to maintain spatial integration within family ties or social networks and, at the same time, commuting out of their life space every day. This paper analyzes the multiple dimensions of the residential choice for long commuters. To address this, a one-week gathering of geolocated data via a mobile application will map the life space of 50 low-income workers. Then, an interview will facilitate the retrieval of retrospective data. An adaptation of the “Ageven” form was made for the purpose of studying family, residential, professional and mobility trajectories as well as the life space along different life cycles. Through a life course approach, it is possible to observe how residential choice may change over time, the circumstances in which a residential mobility occurs, its motives, and its impact on the daily life space.