You can experience a disproportionately large impact in a small town because:
(1) On a percentage basis, you will probably see more results… a greater response rate.
(2) More religious freedom… more respect for the sacred… sometimes, it is mere lip service, but it gives you more access.
(3) There is less to do in a small town so you have less competition and more opportunities to connect with people
(4) It is more cost effective… you have a lower cost of living… you can experience more ministry bang for the buck.