Is full-time service a lifetime commitment?

The investment of time, money and effort (not only yours, but also that of those who support and train you) to prepare for full-time ministry is very significant. Therefore, it would be foolish to go into full-time service unless you intend it to be a lifetime role. Once you are in the ministry, unless God makes it very clear that His will is for you to serve Him in a different capacity, you should remain.