a. Long-term vs. short-term: Ideally the pastor will lead the new church to start others but will remain as pastor of the original church because he’s a pastor with a missionary’s heart rather than a missionary with a pastor’s heart. The founding pastor learns church planting since it is needed to start the church but then he moves to the issues of being a pastor and eventually raising up others to plant. Statistics show that longer tenured pastors tend to grow stronger churches. Generally, plan a long-term commitment as long as the planter is effective.
b. Church planter vs. planting church: The two approaches are typified in the ministries of the church at Antioch and the Apostle Paul. Antioch was at the epicenter of the church planting movement [Ac.13-15]. Barnabas and Saul were sent along with other leaders to begin planting churches in the Roman province of Asia Minor (modern Turkey). Ac.13-14 documents their missionary journeys and the formation of church plants. They returned to their home church and reported all that God had done, and remained in Antioch for a long time [Ac.14:26-28]. Paul was a church planter and after some days felt stirred, and approached Barnabas to return and strengthen the churches that they had planted [Ac.15:36]. Ultimately, Paul went with Silas, and Barnabas went out with Mark and more new churches were established.
Consider the type of cloth that you are cut from. Perhaps you are like Paul and imagine yourself planting a church and developing leaders and the ministry to a sufficiently healthy level that you can responsibly transition the lead pastor role to another, and then you go out to replicate the process. On the other hand, you may be more like the church at Antioch. Your strategy is to develop the local church and use it as a base to prepare church planters and send them out to plant churches with your support. Either model can be effective and viable, but it is helpful to have a sense of your calling as you approach the process of church planting.