Foreigner purchase effects are complex. While a unit sold does immediately reduce the supply by 1 unit, new demand and foreign funds can also stimulate more bu

Foreigner purchase effects are complex. While a unit sold does immediately reduce the supply by 1 unit, new demand and foreign funds can also stimulate more building and, especially important, can prevent areas falling into disrepair and becoming ghost towns. It really depends on the specific area and situation. My 2c.