On the other hand, wealthy is not quite as relative. A person having a jet that costs $100 can do about as much with it as a person with one costing $100 billi

On the other hand, wealthy is not quite as relative. A person having a jet that costs $100 can do about as much with it as a person with one costing $100 billion. Same goes with housing, mostly, with some obvious wealth breakpoints. The confounder is location, as defined by time to travel and job availability. Quantization artifacts dominate. Having access to basics vs not has a much bigger effect than either quality or quantity. This is why having just one house is not an investment - you cannot afford to not have one unless you're so rich you could outright get multiples of them in some places, get there and live comfortably.