Paul spent months, and sometimes years in a town to establish the assembly. Why do we then think that by doing “ministry” in a couple of days time we can make an impact?
Today is more evil than the days of Paul. Why would less time work now?
The problem is: we have no time. But who will? Will anyone? Is this the real problem?
While we may not have much time available it is up to us how we spend the time we do have. You can either spend it to jump around and go to every place of the earth to “reach all creation”. Or stay where you are and spend all that time that you would spend in different places in Africa and make a real IMPACT. At the place where you are now. Right now, right there.
It is also possible that you would want to go to one place in Africa, but then please stay there! Do not go to another town until you established the assembly. Do not jump around. It’s worthless.