SEO help for Plumbing Business for multiple cities

So if I have a door to door service company and I service Toronto and nearby cities up to 40km, do I need to use YOAST Local and create a page for every city that I offer my door to door service in to do a great SEO job? OR can I target all the cities on one page?
What is the ultimate way to do this?

Target seperately, as one page is optimized for one keyword intent. For example: If you are plumber and offer your door to door services in toronto and nearby cities then its natural to make sense for creating seperate pages for toronoto and other nearby cities. This makes google to understand betterly about your page topic and rank it according to the database when some search for the query on which you have a whole dedicated page.