Houses vs Units: Which Will Make You a Millionaire?

I arrived in Melbourne last Sunday and will be in Melbourne for around 10 days. I met my friend who shared with me that she was staying in a townhouse and she explained that a townhouse meant that the owner of a big piece of land decided to sub-divide the land and build units within the same land. Her home is one out of 16 other units within the same piece of huge land. In other words, this particular house on one piece of land was demolished and 16 units of townhouses are now on the same piece of land. Do read a brief explanation below: