Help with Garmin Database Update

[Ernie Martin]

My 337G has a Garmin GTN650. The data card needs updating and the Garmin website is not very clear. I'd be most grateful if any of you can help me with these questions:

1. If I only fly in Florida and the Bahamas, do I need to buy the US Fixed Wing Database Bundle for $499?

2. When will that Bundle need updating again? I bought the aircraft in 2015, the unit was installed in 2014, and all the airspace data (airports, etc.) disappeared a couple of weeks ago, so maybe it's a 6-year cycle.

Thanks in advance.
Ernie