There are no clouds or few clouds in the sky. Describe a sunny day, but also a cheerful mood.
In Chinese usage, the word "sen" is often associated with Woods, green and health, and also has a gloomy coolness. It is a good choice to match Qing characters. These two words give a good name to the community and make people sound energetic and positive.
Homophonic sounds like a deep garden in the past, adding a little humanistic warmth.
However, personally, Sunshine Garden is better to read than Sunshine Garden.