Webpage with a suburb mentioned several times - I want a scrip that changes that suburb and creates page

Hi.

I have a web design company.
I want to create a webpage that is for example for web designs / sites Brisbane
now, I want you to create a script where every word on that web page is replaced to the new city/suburb
so then we dont have to manually create massive amounts of pages manually.

It would be even better if the SEO metrics for the page could be updated as well, such as Page title and other Key defining Features.