10 cops means 1-2 on shift at a time, once you figure in days off, needing people working 24 hours a day, a leadership position or two, and people out sick/vacation, 10 people isn't as many as it sounds.
However, even 10 is a huge amount for a town of 250. I think most towns of 1-2k people generally don't have a department and usually rely on county police.