You don't need citizenship at all. Not even permanent or temporary residency. You will become a tax resident of a state even if you have just a tourist visa. You don't need to own the property either, a rental apartment is just fine. Even living in a hotel would work if you can prove it was your "base of operations" during that time.
Not sure what's the distinction between rich and wealthy, sounds the same to me.
Not sure what's the distinction between rich and wealthy, sounds the same to me.