Patagonia is always a good choice. There also has been similar things with British people running their private colonies/kingdoms in small islands near Australia with imported Malay (slave) labour. It's probably possible to do so in most places in Africa. One can also consider Roman Ungern von Sternberg's takeover of Mongolia to be similar I suppose.
I was thinking - Perth is set up by an ambitious young Englishman married to the youngest daughter of a wealthy SEA Chinese family, it later becomes semi-independent as Western Australia with similar rules to Sarawak, and finally admitted to the Commonwealth of Australia as a Duchy, with the ruling family's position now officially one step below the royals in London. Perth itself will have set itself up as a place where everyone can do business with low taxes and even lower oversight, traders making the trip across the Indian Ocean could stop there to do the shadier parts of their deals.
It's almost all built on imported labor and imported capital and the grey-market, and the whole Duchy would be majority 'Australian' today, the majority is a metis of convicts and kidnaps from around the Empire and Pacific Ocean, while Perth itself would be majority 'English' (European with some Asian ancestry allowed but usually ignored, and you'd better be able to find an English ancestor) until c. 1990ish, and then finally majority 'Australian' by c. 2010ish, with Asians, mainly Chinese, as a constant 10% minority for the last century. It would be the closest to South Africa during Apartheid, but this would take the form of their own more extreme racist/apartheid policies, of arguing about international relations with SA in Canberra, and private groups funding South Africa, and they'd be forced to reform pretty quickly once apartheid falls.
Arguments over Australia voting to be a Republic have always included the Duke of Perth (or maybe Duke of Black Swan City, or the Black Swan Duke), who might be forced to be a merely massive land-owner if they vote to become a Republic. But in 2019 (butterflies did not prevent the alt-right and new nationalism) there is a sizeable movement that wants this vote to happen, as part of their master plan to force WA to secede and become their glorious new apartheid state. The Duke himself would rather this not happen, but has to make sure he'd survive if it did, so his twitter feed is frustratingly neutral on the subject.
*Cough*"
less has been widely understood and commonly used as a synonym for
fewer since it first appeared in Old English as
læs."*cough*
Excuse me there, bit of a cold coming on.
I feel like I actually know fewer than I did before. That's the sign of having received an education, right?