Is it possible to create a directory such that all data will be stored in the main installation e.g. some-domain.com and people can also browse or search the listings from there.
However, they can also go to a specific location for e.g. mumbai.in.some-domain.com which will then show all the listings from Mumbai, India only.
Further, they will then be able to perform a search on specific areas in Mumbai e.g. Fort, Bandra, Andheri etc...
I can't recall, but I have seen this is some local website but its targeted to US & Canada only.