No problem, we hope we can help with your dilemma :) In answer to your questions:
1) The information required to allow for listings to be imported successfully via .csv does not include the email address, so you can import business data if it is also accompanied by actual listing data (although please
note the geocode request limit imposed by
Google maps).
2) Vantage does not currently include filters by region by default (outside of the use of the actual search tool), however you can find a
Multi city plugin in the
AppThemes marketplace which will extend the theme to allow a location specific filter which may give you the functionality you are looking for.
3) Further to what is mentioned in the answer above, you can search by location using the "near" search field, and within those results you will have the option to refine the search by distance, as seen on the
Vantage demo site here.
4) You can certainly
customize the theme in order to change the way it looks by default if you wish. You can find some nice examples of what some other customers have done with Vantage in the
AppThemes customer showcase.
5) Yes you can upgrade between the license types easily, paying only the difference between the two.
Thanks :)