According to Celebrity Net Worth, the Isla de Sa Ferradura, in Spain, is worth $39.7 million. The island is near Ibiza, so it is possible to enjoy the parties there and come back to a quiet place.
The island has a villa available for rent, and it costs up to $300,000 per week. The mansion has five bedrooms, a sauna, jacuzzi, beauty salon, gym, heated swimming pool and sports facilities. According to their website, it is sunny most days of the year. So you don’t need to wait until summer.