Stuck on doing keyword research for multiple locations

Do the research once for the service, not per city. The modifiers are the same everywhere (cost, near me, emergency, best, etc.), only the volume changes. Then set the location in Keyword Planner city by city just to see which places are worth a page. The bigger trap is the pages themselves. If every location page is the same text with the town swapped, they tend to get ignored. Give each one something local, jobs done there, areas covered, local reviews.