In short: invest USD 42.4m in developed real estate; demonstrate sufficient income generated outside of Cayman to support yourself in the Islands; spend approx. 9 months a year on island for five years, after which time you can submit an application to become a British Overseas Territory citizen.
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How can I get a British passport by investing in the Cayman Islands investor visa programs?
How long would it take me and would I have to actually reside in Cayman Islands? If so, for how long?