Your sub count needs to consistently be 1k for an entire week to enable your Community tab. If your sub count decreases under 1k anytime during this week, you're no longer eligible, so it may take a bit longer. Hope this helps clarify!
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more