Paul was not a located preacher in the sense of modern day usage. In the time spent at Corinth and Ephesus, he merely used them as a base from which to travel throughout their provinces teaching the word, as is evinced by the expression "all they which dwelt in Asia." In the early days of the United States, there were "circuit riders," evangelists who traveled a territory preaching at numerous locations in the area. Most were based at a particular place, and traveled from there, making a circuit. They preached at a different location virtually every time they preached, and may have, like Paul, spent many months or even several years making the circuit.
Our located preachers grow roots, and preach to virtually the same people year after year. Our congregation has had only 2 pulpit ministers in the last 44 years. These are truly located preachers in the sense that Paul never was; indeed, I think he would have been appalled at the practice. Not only that, while Paul condoned full financial support for evangelists, he supported himself by practicing his profession of tent-making. I think he would also be appalled by the high salaries demanded by "located" preachers in our day for spending about 1-1/2 to 3 hours per week in practice of their profession and the rest in "administrative" duties.