I do think it would be feasible to have a subscription purchase to reserve a personal housing instance.

However the question would remain on whether you can share this instance with others and what that would entail? Is there a directory of these personal instances? Then everyone would KNOW you pay real money for that, at least most of the vanity items are more discrete. And so how would acces be allowed? Do you make a list? Would it be a check list? A virtual lifetime invite you share?