I have a property developer friend who had the idea to create a sort of luxury village in Southern France where successful people from the arts / entrepreneurs etc could meet. People that had achieved financial independence and weren't "part of the system". Sort of like a safe enclave to exchange ideas. He did well + things were progressing, but during the financial crisis in 2007 banks pulled out (€50m in loans) of the deal and wiped him out.

I honestly wonder how many people would be interested in living like this.