A Residential airpark (also spelled air park) is also referred to as a "fly-in community". The word can also refer to a community specifically designed around an airport where the residents each would own their own airplane which they park in their hangar usually attached to the home or integrated into their home.
This type of airfield is very different from a General Aviation Reliever Airport, which are airports designated by the FAA to relieve congestion at Commercial Service Airports and to provide improved general aviation access to the overall community. These may be publicly or privately-owned.
The Lakeway Airpark is not designed to be, nor does it have the capability to be a reliever airport for ABIA.