I found yet another question
My revised plan was to make a copy of the homepage with the main information but insert the city name into it often as well as add a couple paragraphs of city info. Would this be enough of a change to not hurt my ranking?
Second, I was going to name each one of these pages mywebsite.com/cityname_electrician.php. However, I have seen other contractor's websites and they seem to always to it like this: theirwebsite.com/cityname_electrician/index.php
For my own curiosity, is there a difference whether you make it just another webpage in the same directory as the others, or if you make the page the index page of it's own directory?