One of the first questions I hear after a workshop for priests is, "How can a small parish implement this idea of promoting vocations?" No matter the size of the parish, everyone should start SMALL and with prayer! As a pastor of 1-3 small parishes, you can have one entity overseeing all three parishes or one at each parish. You know your parishes best. Trust yourself and the Holy Spirit to guide you.
The principle of the work is the same: if the parish is more vocation-minded, the Holy Spirit can inspire more families and youth.