The issue of Public Restrooms or Restroom access for people visiting a PUBLIC PARK was brought up. Not all people visiting the PUBLIC Park will be welcome to use the Senior Center Restrooms. You know it and I know it.
Imagine a family visiting a resident at the villa, with say a bunch of grand kids and they use the park as a meeting place. Will the Kids be welcome into the Senior Center during Card Games? Will the Kids be locked out on weekends? Will the Senior Center Restrooms be available for the public on the Weekends? No their is a need for a Restroom if it is to be a Public Park.
There is a need for a restroom if the Seniors living in the Villas or the Senior Center are visiting the park as some of them quite frankly can't make it back to their apartments or to the senior center to answer the urgent call of nature.
So if there is going to be a water feature, make a restroom first and foremost, or include in the Senior center Design restrooms that are accessible from the Park.
Plant list should include: Permaculture that will provide good nutrition for the visitors and residents of the park, and be low water demands.