Please suggest for directory!

I need to setup a wordpress based directory i have got the perfect simple and good theme called directory, but i want to display a different homepage just like zomato when you choose your city. I also want wpml support which the directory theme provides but i wanna know what should be the approach? Should I make multiple websites for each city a separate website? or is there a way of creating website with multiple cities linked to multiple home pages with custom subdomains like cityname.sitename.com Any guidance would be appreciated.
WordPress.org username: morganthx
Your Question (single sentence please): Need help with wordpress directory?